Frequently Asked Questions (FAQs)

If you've already used all allotted activations on your MR license, deactivate your license ID from the Software Setup on a computer no longer being used for data collection. This will automatically free up an activation to be used on a different computer. Deactivation instructions are shown below.

Only need a license ID for analysis and reporting purposes? You can request a free student license at our student license request page🔗. Student licenses are unlimited for every MR license, and can be used for data collection and reporting purposes only.

Deactiave a license in MR4:

Deactivate a license in MR3:

This error message means all activations available on your license ID have been used. If you need to activate MR on a new computer, it is necessary to manually deactivate your MR license on a computer you are no longer using. This will automatically free up a license to use for the new computer. Deactivation instructions are below.

Deactivate a license in MR4:

Deactivate a license in MR3:

The error message "Socket:: Connection: socket closed," typically indicates that the local MR software installation is unable to establish a connection with our server effectively. This could be due to various reasons, including network issues or other firewall problems.

Sometimes, allowing the MR program through the computer's firewall may solve this. If activation by internet is not possible, contact support@noraxon.com with the activation ID and version of MR you are trying to activate, and a Noraxon Support representative will send a manual activation code.

Deactivating a license ID for data collection purposes will automatically free up an activation allowance to be used on another computer.

NOTE: Deactivating student license IDs is not possible as they are temporary and can only be used once. However, a new student license ID can always be requested for the purposes of data collection. Request a new student license ID here🔗.

To deacitvate your license in MR4, follow the instructions below:

1. On the Home tab, click the gear button and select Software Setup.
2. Go to the About & License tab.
3. Click Deactivate.

To deacitvate your license in MR3, follow the instructions below:

1. On the Home tab, select Software Setup.
2. Go to the About & License tab.
3. Click Deactivate.

This message indicates you are trying to activate a version of MR that you do not have access to based on your software maintenance expiration date.

To check which version of MR you can activate with your licence, use the MR Software Maintenance Check Tool🔗. This tool will also tell you what needs to be purchased to upgrade, if desired.

To get a quote to renew your software maintenance and access the latest version of MR, contact sales@noraxon.com

To find legacy downloads for older MR versions, visit the legacy downloads page🔗.

To find the latest version of MR, visit the software downloads page🔗.

The error message referencing “wglCreateContextAttribsARB” is typically related to the graphics driver or GPU compatibility. Based on that, I recommend checking the GPU configuration on your PC. Please follow the steps below:

1. Confirm that the PC you're using meets our minimum specification requirements. Often, if a computer's CPU does not meet the required minimum specifications, this message will appear.

Noraxon MR Minimum Computer Specification Requirements🔗

2. Verify the installed GPU

Open Device Manager

Expand the Display adapters section

Confirm which GPU(s) are listed (e.g., NVIDIA or Intel). NOTE: Noraxon recommends having a discrete graphics card (NVIDIA, AMD, etc) in addition to the integrated graphics card (e.g. Intel) as the integrated graphics cards are often not powerful enough.

3. Ensure the dedicated GPU is being used by MR4

• Open the NVIDIA Control Panel
• Go to Manage 3D Settings > Global Settings
• Set the preferred GPU to High-performance NVIDIA processor
• You can follow this video guide🔗 for reference

4. Update the GPU drivers

• If the system uses an NVIDIA card, download the latest drivers from the NVIDIA Drivers page
• Install the appropriate driver for the GPU model and restart the PC

Once the GPU drivers are updated and MR4 is set to use the dedicated GPU, try launching the software again. If the issue persists despite updated graphics and power settings and the PC meets the specifications required to run the MR software, contact Noraxon Support.

The computer specification requirmement for the myoRESEARCH (MR) software can be found here:

Download MR Computer Specification Requirements🔗

If it is an OpenGL error, then the issue is related to the computer's graphics card.

Either the graphics card does not meet our required minimum computer specifications🔗 or the graphics card needs to be updated. Usually, it is a matter of a simple graphics card update if your existing graphcis card meets our required minimum specifications. The article linked below shows how to update the power settings on your PC. If you have an NVIDIA graphics card, follow the same steps in the video to access the NVIDIA control panel.

Optimization of Computer Power and Graphic Settings [VIDEO]🔗

We also recommend updating to the latest drivers for the graphics card. Usually it is best to download them directly from the manufacturer (not from within Windows, as Windows can tend to be behind on the latest drivers available). You can search for the drivers for your computer's specific graphics card at the link below.

https://www.nvidia.com/en-us/drivers/

Noraxon supports integration of 3rd party products through digital (USB connection) of the following systems:

• Zebris pressure distribution platforms and treadmills
• Bertec force plates via the AM6800 amplifier or AM6500 amplifier
• AMTI force plates via the Optima amplifier or the AMTI optimized force plates
• Medilogic Pressure distrbution insoles

Noraxon supports integration of 3rd party products through analog integration of the following systems. Note that the Noraxon Analog Input System (AIS) must be used to integrate these devices:

• Kistler Force Plates
• Bertec Force Plates via the AM6501 amplifier or AM6800 amplifier
• Isokinetic dynamometers such as Humac Norm (CSMi) and Biodex

If the device you are looking for is not listed, it may still be possible to integrate it via analog outputs through the Noraxon Analog Input System. Consult Noraxon Support for further assistance and advice. In these cases, analog output scaling values given by the manufacturer of the product are needed.

If synchronization is needed between Noraxon and a 3rd party system, this can be done easily via hardware synchornization with TTL pulses. To learn more about this synchronization method, visit the article linked below.

Synchronizing Noraxon Devices with External Systems Using TTL Pulses🔗

A "sync not detected" error means that the MR software was looking for a sync trigger from that device, but didn't find one. Most of the time, this is because of one of the following reasons:

1. The sync cable for that device is not connected correctly.
2. There is a cable plugged into the "Sync In" port on the MyoSync, but there shouldn't be. (If the sync trigger is being generated for only Noraxon devices, nothing should be plugged into the "Sync in" port.). The "sync in" port is only used when triggering a recording with a 3rd party external system.
3. The switch on the top of the MyoSync is flipped ot the wrong direction. The MyoSync switch should be flipped to the right in the image below, so that it is pointed toward the signal that looks like a square wave that goes from low to high, then high to low (circled in blue, below)

For a list of the specific sync settings required for each Noraxon device and details on how to set up the MyoSync, refernece the MR4 Synchronization Guide🔗.

All data collected in the MR software is stored locally to the data collection PC. An external local database location can be created in a different spot through the MR Software Setup.

Periodically, backup the data in your database to an external location using the Export >> Export from external location operation from the Database tab.

Reference the MR4 Data Backup, Management, and Sharing Guide🔗 for full instructions on creating and maintaining a data backup.

The easiest way to share data among multiple PCs is to use a Shared Database location. The Shared Database can be located on a server, and allow for quick sharing and backup of data.

For more details on how to set up a Shared Database location, reference the MR4 Data Backup, Management & Sharing guide🔗.

Data can also be shared between computers by exporting MR data using the Export >> Export data to external location operation. The "Noraxon MR data" file created during this process can then be shared with others by dropping into a shared Google Drive or similar, using a flash drive, or sending over email.

Yes! Feel free to visit our Custom Report Templates page for some custom template options. If you don't see your application here or in any default reports in MR, please contact Noraxon Support (submit a support request) for assistance. We are happy to help with report customization!

Custom report templates🔗

Visit our Report Generationa and Customization section of our Knowledge Base for more information how report customization for various applications.

Report Customization section of Knowledge Base🔗

We are also happy to assist with custom report creation for customers with current software maintanance agreements. Reach out to Noraxon Support (submit a support request) to request report customization assistance or templates.

The report you choose is dependent on your application. For more details on running pre-built reports available in the MR software for different applications, visit the Reporting and Customization section of our Knowledge Base. Here, we have tutorials on how to run basic reports and on how to modify reports for your needs.

Report Customization Section of Knowledge Base🔗

Assistance and feedback on report customization for your specific applications and project needs is always available through Noraxon Support. Contact our support team to request a Zoom meeting to review report customization specifics for your application. (Note that this is avialable for customers with current software maintenance agreements with Noraxon).

Refer to the cleaning instructions from each hardware manual for instructions on cleaning your specific sensor.

For sanitary purposes, it is advisable to clean the back of the EMG and IMU sensors on a regular basis. Ultium sensors can be cleaned with a cloth slightly dampened with a solution of mild soap and water. Use of even mild disinfectant solutions (i.e., isopropyl alcohol swabs or household disinfectant wipes) is not recommended as they can degrade the polypropylene plastic on the sensor housing over time.

Noraxon sensors are not warranted against exposure to any of the conventional forms of sterilization (autoclave, heating, etc). Users wishing to utilize this equipment in a sterile environment, such as an operating theater, should consult Noraxon for other options.

The best way to test would be to charge the sensors fully overnight, start a measurement with them in the morning (with the receiver plugged into power) and sensors simply sitting in the charging block (unplugged). If you notice the sensors start to die in any time frame less than 3/4 hours, (or early enough so that the runtime is no longer suitable for your application) you will know they need replacement.

Offline Data Recovery is recommended when data loss is extensive or intermittent for long recordings. To recover data offline ensure the system is plugged in as described below:

• Each sensor must be in the charging station, and the charging station must be connected to the Ultium receiver.
• The Ultium receiver should be connected to the computer
• Each sensor should be turned on (LEDs blinking blue)

When you're ready to recover data offline, use the Import function in MR and select the Import Offline Data Recovery option from the Database.

For more details about online and offline data recovery, reference the relevant user manual for your systme in the Lossless Data Recovery section.

Link to Ultium Motion User Manual🔗

The Ultium System supports “lossless” data recovery. The sensors continue to capture and store data (>8 hours of data) when communication is temporarily lost with the receiver. Once the record is completed, the data can be recovered later in two ways:

1. Real-time (online recovery) is initiated immediately after saving a recording.

2. Later recover (offline recovery) via the Import function is available after cancelling online data recovery (choosing "Recover later")

Those two methods of data recovery are possible with all sensors in the Ultium line (Ultium EMG, Ultium Motion, and Core EMG), and are detailed below.

Online Data Recovery starts immediately after saving a measurment (using the Save & measure again or Save & View options) automatically. You know sensors are recovering data when you see the "Recovering, please wait..." message on the screen.

During this process, each sensor transmitswirelessly any packets of data that could not be transmitted in real time due to wireless interference or distance to the Ultium receiver. We recommend that the subject wearing the wireless sensors remains close to the Ultium receiver (2-5 m away) during data recovery.

Note: Online data recovery can be slow when data loss is extensive or intermittent for longer recordings. In these cases, we recommend following the process for Offline Data Recovery, as it works 20x faster than Online Data Recovery.

Offline Data Recovery is recommended when data loss is extensive or intermittent for long recordings. To recover data offline, follow the steps below:

Ensure the following connections between the sensors and the Ultium receiver:

• Each sensor must be in the charging station, and the charging station must be connected to the Ultium receiver.
• The Ultium receiver should be connected to the computer
• Each sensor should be turned on (LEDs blinking blue)

When you're ready to recover data offline, use the Import function in MR and select the Import Offline Data Recovery option from the Database.

For more details about online and offline data recovery, reference the relevant user manual for your systme in the Lossless Data Recovery section.

Link to Ultium Motion User Manual🔗

If the EMG signal or baseline is noisy, check the following:

1. Ensure good connection from the EMG sensor to the electrode.

If using Ultium EMG, ensure the lead is connected to the sensor, and the leads are properly attached to the electrode.

If using Core EMG, ensure the electrode is properly connected to the back of the Core EMG sensor.

For more information on sensor placement/adherence, reference the EMG Skin Prep, Electrode Placement, and Signal Check Tutorial🔗.

2. Make the checks listed in the Evaluating EMG Signal Quality🔗 document.

Perform the checks listed to check resting baseline noise, signal impedance, and frequency interference.

3. Swap sensors/replace the electrode.

To rule out the possibility the bad signal is related to the sensor or the electrode, swap with another sensor, or replace the electrode.

A "wandering baseline" effect in the EMG signal can be present when there are no high-pass filters applied to the raw signal.

This is the expected behavior of an EMG waveform with no high-pass filters applied. The drift is related to the behavior of the electrodes—There is a small DC voltage created by the two electrodes in contact with the body. It is typically on the order of millivolts, and changes to this small voltage over time will appear as a drift in the baseline of the EMG waveform. It looks pretty strange if you're unfamiliar with this phenomenon! Below is an example of what it looks like (the baseline drifts around "0".)

Normally, the high-pass filter applied as the default for Ultium sensors (e.g. 10 Hz) eliminates the low-frequency content of the signal which contains the offset caused by the voltage difference between two electrodes. With the DC offset removed, a flat baseline is achieved. Other EMG manufacturers have built-in hardware filters on their surface EMG sensors because a bandpass filter is a basic requirement for measuring surface EMG. In the case of Ultium, the "No filter" option is necessary for other kinds of (non-EMG) signals.

Note that the digital filters selectable from the Hardware Setup are not shown in the processing history. Unless it is changed, the default is a 10 Hz highpass filter and 500 Hz lowpass filter.

Refer to the cleaning instructions from each hardware manual for instructions on cleaning your specific sensor.

For sanitary purposes, it is advisable to clean the back of the EMG and IMU sensors on a regular basis. Ultium sensors can be cleaned with a cloth slightly dampened with a solution of mild soap and water. Use of even mild disinfectant solutions (i.e., isopropyl alcohol swabs or household disinfectant wipes) is not recommended as they can degrade the polypropylene plastic on the sensor housing over time.

Noraxon sensors are not warranted against exposure to any of the conventional forms of sterilization (autoclave, heating, etc). Users wishing to utilize this equipment in a sterile environment, such as an operating theater, should consult Noraxon for other options.

The best way to test would be to charge the sensors fully overnight, start a measurement with them in the morning (with the receiver plugged into power) and sensors simply sitting in the charging block (unplugged). If you notice the sensors start to die in any time frame less than 3/4 hours, (or early enough so that the runtime is no longer suitable for your application) you will know they need replacement.

There are several factors that can contribute to the avatar looking skewed drifted, includind sensor placement, calibration, and whether Returns to the Ref Pose are used to correct for drift.

Ensuring the sensors are placed correctly and the calibration is performed well are crucial steps for data integrity. Here are some initial troubleshooting steps to follow before contacting Noraxon Support for further assistance.

1. Check to ensure sensors are placed correctly on all body segments. The sensors must be oriented so that the LED is pointing upwards, and sensors placed bileterally should be symmetric on both sides. For more details about sensor placement, follow our IMU Sensors Placement Video Tutorial🔗 and sensor placement instructions in the Ultium Motion Quick Start Guide🔗.

2. Zero Gyros each day before measurement. This step is meant to remove any offset bias from the internal gyro components, and is necessary as a maintenance procedure.

Gyros can be zeroed by clicking on the notifications bell from the Home tab or from the Ultium device setup in the Hardware Setup.

Zero gyros from the Home tab:

Zero Gyros from the Ultium Device Setup:

3. Ensure you are using a Functional Calibration routine (e.g. the Walking Calibration or Forward Lean Calibration) and that you are capturing Returns to Ref Poses at least at the beginning and the end of each measurment, or more often for longer recordings. The tutorials linked below contain instructions for both options.

Walking Calibration Tutorial🔗

Forward Lean Calibration Tutorial🔗

4. Ensure you are calibrating again for each subject or after moving the IMU sensors. The calibration is only good for as long as the sensors remain in the same positions they were in during the initial calibration. If the sensors are moved to a new subject or are removed and replaced on the same subject, re-calibration using the Walking or Forward Lean calibration is necessary.

If issues persist, contact Noraxon Support for further troubleshooting steps and advice.

When a functional calibration (e.g. Walking, Forward Lean, or MultiPose calibration) is used, you shouldn't experience any magnetic distortion. Those routines are designed to be magnetically immune and are not affected by environmental factors or magnetic distortion. When combined with Returns to Ref Pose during measurement, the functional calibrations can effectively eliminate all gyro drift.

For more details on recommended calibration processes, follow the video tutorials linked below.

• Walking Calibration Tutorial🔗
• Forward Lean Calibration Tutorial🔗 (perform this one if all lower body sensors are not available or when limited space is available).

If drift or distortion issues persist after performing a functional (walking or forward lean) calibration routine combined with Returns to Ref Pose, reach out to Noraxon Support for further assistance.

Offline Data Recovery is recommended when data loss is extensive or intermittent for long recordings. To recover data offline ensure the system is plugged in as described below:

• Each sensor must be in the charging station, and the charging station must be connected to the Ultium receiver.
• The Ultium receiver should be connected to the computer
• Each sensor should be turned on (LEDs blinking blue)

When you're ready to recover data offline, use the Import function in MR and select the Import Offline Data Recovery option from the Database.

For more details about online and offline data recovery, reference the relevant user manual for your systme in the Lossless Data Recovery section.

Link to Ultium Motion User Manual🔗

The Ultium System supports “lossless” data recovery. The sensors continue to capture and store data (>8 hours of data) when communication is temporarily lost with the receiver. Once the record is completed, the data can be recovered later in two ways:

1. Real-time (online recovery) is initiated immediately after saving a recording.

2. Later recover (offline recovery) via the Import function is available after cancelling online data recovery (choosing "Recover later")

Those two methods of data recovery are possible with all sensors in the Ultium line (Ultium EMG, Ultium Motion, and Core EMG), and are detailed below.

Online Data Recovery starts immediately after saving a measurment (using the Save & measure again or Save & View options) automatically. You know sensors are recovering data when you see the "Recovering, please wait..." message on the screen.

During this process, each sensor transmitswirelessly any packets of data that could not be transmitted in real time due to wireless interference or distance to the Ultium receiver. We recommend that the subject wearing the wireless sensors remains close to the Ultium receiver (2-5 m away) during data recovery.

Note: Online data recovery can be slow when data loss is extensive or intermittent for longer recordings. In these cases, we recommend following the process for Offline Data Recovery, as it works 20x faster than Online Data Recovery.

Offline Data Recovery is recommended when data loss is extensive or intermittent for long recordings. To recover data offline, follow the steps below:

Ensure the following connections between the sensors and the Ultium receiver:

• Each sensor must be in the charging station, and the charging station must be connected to the Ultium receiver.
• The Ultium receiver should be connected to the computer
• Each sensor should be turned on (LEDs blinking blue)

When you're ready to recover data offline, use the Import function in MR and select the Import Offline Data Recovery option from the Database.

For more details about online and offline data recovery, reference the relevant user manual for your systme in the Lossless Data Recovery section.

Link to Ultium Motion User Manual🔗

For more detilas on editing and reviewing events in the Powers Running Assessment, visit the tutorial video below.

How to Review and Correct Events in the Powers Running Assessment [VIDEO]🔗

For more details on data interpretation for the Powers Running Assessment, review the Powers Running Assessment User Guide (sections on biomechanical interpretation and investigation profiles) and our webinar with Dr. Powers as be explains how the investigation profiles available in the MR software relate to the visible parameters.

Powers Running Assessment User Guide🔗

Powers Running Assessment Addressing Lower Extremity Pathomechanics [WEBINAR]🔗

2D and 3D angles are not directly comparable. While the Ultium Motion IMU system works to measure motion based on sensors, the accuracy of the 2D markerless system is entirely dependent on the camera setup.

For more information on understand the difference between 2D and 3D data, visit our Knowledge Base article, Understanding the Limitations of 2D Video Analysis vs. 3D IMU-Based Motion Capture🔗.

Whenever tracking fails, ensure you are following the best practices outlined in the Tips of Markerless Tracking document🔗.

Here are some initial suggestions:

• Ensure the entire subject is visible and in frame thorughout the tracking interval. If part of the subject's body is cut off, tracking will not work.
• Ensure there is only one subject in frame or that no other people are visible in the background.
• Ensure adequate contrast between the person and the background, and adequate lighting.
• Ensrure the camera is set up perpendicularly to the movement to reduce parallax error so accurate angles can be captured. For more details on the importance of camera setup as it relates to parallax error, review the Understanding the Limitations of 2D Video Analysis vs. 3D IMU-Based Motion Capture article🔗.

Visit our 2D Markerless Getting Started Guide🔗 for details on how to set up the cameras and a measurement.

For more details on camera position, environment, and subject attire for best tracking practives, refer to our Tips for Markerless Tracking Guide🔗.

Post-stabilization begins when the landing phase ends. The pre-stabilization and post-stabilization phases provide an initial condition for calculations involving impulse as well as center of mass velocity and position, which are sensitive to even slight movement.

Usually, you will see this error if the athlete performing the test does not stabilize after a jump or wait long enough between multiple jumps during a countermovement jump or squat jump test. To fix this, instruct the athlete to wait slightly longer between jumps.

The impulse-related calculations for that jump (e.g. jump height by net impulse, etc) will be inaccurate. The pre-stabilization and post-stabilization phases comprise the weight used in all impulse calculations for each jump, and if the stabilization phases cannot be detected, then the location of each jump phase along the timeline will not be accurate.

The error is most commonly shown if the Body Weight interval cannot be detected. The body weight calculation influences the detection of phases and calculation of impulse-based parameters.

If the Body Weight interval is not detected, check your vertical force data to see if one of the following scenarios occurred:

Scenario #1: There is no 0.5 interval of stabilization before the athlete begins jumping or after the athlete is finished jumping.

What happened?

The athlete did not stabilize long enough before or after jumping for body weight to be detected.

How to fix it:

Instruct your athlete to stand still on the force plate for at least 0.5 seconds before beginning to jump.

Additional tips: The body weight interval is calculated from the beginning of the record to the beginning of the first jump. If body weight cannot be calculated in this interval, it is calculated from the end of the last jump to the end of the record. The body weight interval is detected when the total vertical force stays within 5% within the mean for 0.5 seconds.

Scenario #2: The vertical force (Fz) time series data reads <0 N during the flight phase for the jump and 0 N when body weight should be detected.

What happened?

Someone was standing on the force plate when while the force plates were zeroed before a measurement, which occurs during the “Activating Hardware” screen before recording.

How to fix it:

Instruct your athletes to stand off the force plate while activating hardware before a measurement.

The jump type listed is the type of jump detected in MR. If this jump type does not reflect the type of jump you meant to collect, evaluate your jump workflow using the myoFORCE Jump Metrics & Definitions and Jump Analysis Video Tutorial guides as a resource.

🔗myoFORCE Jump Protocols & Metrics [PDF]

🔗Jump Analysis Tutorial & Workflow in MR

Refer to the video from our Knowledge Base, linked below.

🔗Jump Analysis – How to Remove Unwanted Jumps from Reports

If you need to schedule preventative maintnenace soon, know that Noraxon doesn't offer service contracts for preventative maintenance. However, you have a few options for scheduling it moving forward.

1. You can hire any treadmill technician local to your area to perform the service. If your organization has trusted technicians for other equipment you have, they should also be able to perform the maintenance. Mainly, the running surface needs to be lubricated, the belt adjusted, the speed and incline modules checked, and the area under the motor hood visually inspected and cleaned.

2. We can hire one of our technicians through our 3rd party network to service your treadmill. If you'd like for us to send a quote and get this process started, please reach out to support@noraxon.com. We will need to know the serial number of your treadmill.

The link below contains all of the documents you or a technician will need to perform the preventative maintenance, including the maintenance checklists, user manual, and measurement forms.

https://we.tl/t-hbaxnDCIHS

Belt lubrication is detailed in the user manual (in section 11.3, and adjustment of the belt is detailed in section 11.4).