Error in Start DETECTION

[arturmonteiro88]

When i started detection i have this messesger:

[jofabbade]

I'd like to fix that too.

[lu-shin]

mine worked last night for the

first time i installed it...
next day i get these msgs

[Jadamca]

I had this exact issue I think. In blender 4.0 It worked the first time I installed and then stopped the next time I opened it.

Here's a comprehensive troubleshooting solution for the NumPy/OpenCV import error in BlendArMocap:

Solution for "ImportError: numpy.core.multiarray failed to import"

1. Open Blender's Python Console

   • Switch to Scripting workspace in Blender (Shift+F3)
   • Locate the Python Console at the bottom of the screen

2. Find Python Path

   • In Python Console, type:

   import sys
   print(sys.executable)

   • Copy the path that appears

3. Fix Dependencies via Command Prompt

   • Open Command Prompt as Administrator (Windows + R, type "cmd", right-click "Run as administrator")
   • Navigate to your Blender Python directory:

   cd "YOUR_PYTHON_PATH"

   • Run these commands in order:

   python -m pip install --upgrade pip
   python -m pip install numpy --upgrade
   python -m pip install opencv-python --upgrade

4. Restart & Test

   • Close Blender completely
   • Reopen Blender
   • Test BlendAR motion capture

This solution resolves the dependency conflict between NumPy and OpenCV that causes the import error when starting detection in BlendAR.