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Noldus Knowledge Base

Check out detailed explanations on how to make optimal use of your Noldus installation. You can filter on the product you’re using. Looking for quick answers to common support questions? Check out our FAQs

Knowledge Base articles - EthoVision XT


EthoVision XT trial duration does not correspond with system time (Id 12015)

This error message indicates that EthoVision sees that the video has been streaming in at a slower rate than expected, normally due to camera or PC settings.


EthoVision XT error ID 14005 Chart creation failed

This error occurs when you go the Statistics & Charts section of EthoVision XT and you get warning message "Chart creation failed (Id 14005)"


EthoVision XT Resizer error (ID 8359)

If, when you try to grab a background image in the Arena Settings, you receive a warning message "Resizer error (Id 8359)", please reinstall the Resizer component.


Randomizing Events using EthoVision XT Trial Control

EthoVision’s trial control settings allow you to plan out sequences of events during a trial, with specified delays and durations. But sometimes it’s better to vary the delays or sequences unpredictably.


Color-marking animals for EthoVision

There are many options for colored markers that can be used on animals. Colors should be bright and distinguishable.


Correcting the Basler Drivers

Incorrect drivers can result in error 12015 in EthoVision XT or missed samples or low frame rates.


Can I get certain dependent measures (e.g., "distance moved") by zone in EthoVision XT?

It's possible to calculate any dependent variable in your Analysis Profile by zone(s). For example, you can get the “Distance Moved” within each quadrant zone in a Morris Water Maze study.


Why is the sum/total of the cumulative time for all of my zones greater than the trial time?

Time in the zones may not add up to the trial duration if the subject was not tracked for the entire trial, if zones overlap or do not cover the entire arena, or if the zone exit threshold is used.


My video image is missing/black/white/grayed out in certain places in EthoVision XT (e.g., Arena Settings, Detection Settings, Acquisition, Track Editor, Manual Scoring, Integrated Visualization, etc.)

This issue involves a situation where you do not see a video image in certain places in the EthoVision XT software.


Using the MediaTypeRegistryCleaner

When video files will not play in EthoVision XT, especially MP4 videos, this tool can often resolve the issue. Media File Error (Id 8356) may be a symptom in such cases.