Knowledge Base
Documentation, guides, and resources for Noldus products.
EthoVision
Video Files Saving as 0 KB / Corrupt Due to NVIDIA Driver Conflict
Arena/Zone Background Appears Dark or Black During Arena Setup
Software-Based License (SBLK) Activation Fails – 'Activation Not Complete' or 'Key Belongs to a Different Product'
Video Duration Truncated / Incorrect Due to Frame Rate Metadata Mismatch (MPEG-PS to AVI Conversion)
GPU Rendering Issues in EthoVision XT – Switching to CPU Video Processing
License Already Activated on Another PC – Unable to Activate on New or Different Computer
Converting Online (Floating/Internet-Connected) SBLK Licenses to Offline Computer-Locked Mode
Upgrading USB Hardware Dongle License to EthoVision XT 19
EthoVision Installation Fails or Cannot Be Launched After Installation
'Limited Period Warning' Error After Upgrading to EthoVision XT 19
Basler GigE Camera Not Detected by EthoVision or Pylon Viewer
EthoVision XT Compatibility with Windows 11 – Older Versions (XT 15–XT 17)
EthoVision License Activation – Key Shows as Active on Wrong PC or in Wrong Mode
Updating License Owner / Transferring License Registration to a New Contact
EthoVision Installation Download Fails or Is Slow via MyNoldus
Preserving Original Tracking Data When Making Track Editor Modifications
Floating License Stuck Active on Old/Inaccessible PC – Cannot Activate Elsewhere
Large Raw Data Export Failures or Performance Issues for Long / High-Density Recordings
Toolbar or Panel Layout Missing / Floating in Track Editor or Manual Scoring
Detection Errors / False Detections Caused by Moving Objects or Poor Background Reference in EthoVision
Acquisition Delay or Slow Performance in EthoVision XT
Analysis Export Fails Due to Undefined Zones Referenced in Analysis Profile
Opening EthoVision Experiment Files from Older Versions in Newer Versions
Digging Behavior Disappears When Additional Wall Zones Are Added to Arena Definition
Using Trial Control Rules and Sub-Rules in EthoVision XT – Timing and Variable Reset Issues
Selecting and Modifying Multiple Zones Simultaneously in EthoVision XT
Analyzing Behavior Using Zone-Based Parameters and Conditional Variables in EthoVision XT
Camera Image Dark or Not Displaying During Acquisition – IR Illumination and Camera Setup
Pascal-Architecture GPU (e.g., Quadro P2000) Not Supported for Deep Learning in EthoVision XT 19
Automatic Behavior Recognition Module Not Visible or Returning Empty Results in EthoVision XT 19
Trial Control Log Export Causes EthoVision to Crash or Freeze
Deleted Trials in EthoVision – Recovering Video Files and Re-Tracking
Excluding a Static Object from Detection Using Arena Drawing Tools (Doughnut Cutout Method)
Remotely Starting or Controlling Trials in EthoVision XT
Lost or Missing Hardware Dongle During License Upgrade to EthoVision XT 19
EthoVision .vtl Lock File Found in Experiment Folder
USB Capture Card Camera Not Detected as a Video Source in EthoVision
Camera Field of View Incomplete – Adjusting Camera Resolution and AOI in Pylon Viewer for EthoVision
MyNoldus Account Not Linked to License – License or Downloads Not Visible
Running EthoVision on Multiple Computers – Unlicensed Analysis Mode and License Type Selection
Reflecting Highlights on Water Surface Interfering with Animal Tracking in Water Maze
Mini USB I/O Box Not Detected by Computer – Hardware Fault and Replacement
Analyzing Zone Dwell Time with a Minimum Duration Threshold Using Free Interval Nesting in EthoVision
Streaming Real-Time XY Coordinates from EthoVision XT to External Devices
Arena Settings Profile Locked After Acquisition – Background, Calibration, and Arena Outlines Cannot Be Changed
EthoVision Not Compatible with macOS – Windows Required
Dual-Channel (Two-Zone) Optogenetic Stimulation Triggered via TTL Output in EthoVision XT
DanioVision Toplight Unit – Changing Light Color/Wavelength for Stimulus Protocols
Lickometer Temporal Resolution – SDI Polling vs. TTL Mode Jumper Settings
Downloading and Installing an Older Version of EthoVision XT (Legacy Versions) on a New PC
Trial Control Settings and Acquisition Options Not Visible or Unavailable After Installation
EthoVision Hardware System Requirements – GPU, RAM, Storage, and OS Specifications
Reducing EthoVision Video File Size – Resolution, Frame Rate, and Color Space Settings
Clearing Disk Space in EthoVision – Safely Deleting the Intermediate Folder
EthoVision XT Does Not Require Internet Access for Normal Operation
Exporting EthoVision Analysis Statistics to Excel for Graphing
Calibration for Side-View Aquatic Tank Recordings – Accounting for Glass and Water Refraction
Basler GigE Interface Card Form Factor – Full-Height vs. Low-Profile Bracket for PCIe Installation
Broken or Faulty USB Hardware Dongle – Replacement Procedure
Three-Chamber Social Interaction Test Setup in EthoVision – Restraint Cage Placement and Protocol
Missed Samples vs. Dropped Frames in EthoVision – Causes and Remedies
EthoVision Installed at Wrong Version – Activation Key Does Not Match Installed Version
Checking Licensed Modules in EthoVision XT (e.g., Multiple Arenas, Deep Learning)
Switching an SBLK License Between Fixed (Computer-Locked) and Floating Modes
SBLK License Expires When NoldusCare Lapses – Reactivation After Renewal
Installing EthoVision XT on Multiple Computers – License Sharing, User Accounts, and Admin Rights
Connecting and Configuring a Maze Engineers Tap Device with EthoVision XT
Triggering Optogenetic Stimulation from EthoVision XT Using Trial & Hardware Control
Exporting Manual Scoring Data from EthoVision XT
No Data Visible in Analysis / Export – Incorrect Data Profile Selected
Tracking Animals with Poor Contrast Against Background (Black Animal on Dark Background, White Animal on Light Backgroun
USB Hardware Dongle Not Recognized – Driver Installation
EthoVision XT 19 Deep Learning – Cloud Computing and Virtual Machine Not Supported; Recommended GPU Options
Zone Assignment Warning After Redrawing Zones – Zone Belongs to Wrong Arena's Zone Group
PoE Injector Missing from Shipment or Causing 'Device Unplugged' Errors – Replacement Procedure
EthoVision Experiment File Fails to Open – Database or File Error
Free Interval Duration Mismatch – Stop Criterion Never Met Extends Interval to End of Track
Video Cleared from Trial List – Data Permanently Deleted and Cannot Be Recovered
SBLK License 'Offline Period Exceeded' Error – 90-Day Limit Reached on Computer-Locked Online License
EthoVision Analysis-Only Mode – Using the Software Without an Acquisition License
Deep Learning Body-Point Detection and Behavior Recognition Cannot Be Used Simultaneously in EthoVision XT
EthoVision 'Restriction Profile Error' (ID 10020) – Multi-User Windows Account Permissions Issue
Reanalyzing Acquired Trials with Different Tracking Settings (e.g., Center-Point to 3-Point) – Creating a New Experiment
Using the EthoVision Calibration Card for Focus Assist – Printing and Setup Instructions
Connecting USB I/O Box (PTIO-0020) to Third-Party Devices – Cable and Adapter Options for BNC/RJ45
Video File Location Changed After Retracking – Cannot Access Original Video in Track Editor
Tracking White Animals Against Light or Reflective Backgrounds – Improving Contrast and Detection Reliability