Hello all,
I have a problem opening the ALPACA extension, with the stable version of 3D slicer 5.10.0 .
The error code says, it can’t find a certain file. I should have installed all additional extensions to run the extension. I reinstalled the extension again, without solving the problem. On the version 5.8.1 ALPACA works on my device.
Thank you for your help and advice.
Hi!
The issue is a missing itk Python package in Slicer 5.10.0’s environment. Open the Python Interactor in Slicer and run:
slicer.util.pip_install(‘itk’)
Then restart Slicer and try opening ALPACA again. That should fix it!
It appears your slicer 5.10 installation is problematic for some reason. E.g., the real issue is the first error (Application Does Not exist).
I suggest freshly installing it to a new place (like your desktop), install SlicerMorph and retry.
Ok, I did that and got the exact same error as the first time.
I did save it on the desktop as you suggested.
what happens when you do the pip_install(“itk”)
The second screenshot shows just that or did I do something wrong? It says the Application does not exist.
I think there is something weird going on with your installation, though don’t know why. I am going to assume you will get the same problem if you try to pip install another package, like pip_install(“scipy”)
Yes, the same error occurs. The Application does not exist.
I don’t why. I Just did a fresh install of a 5.10 package I downloaded from download.slicer.org, installed SlicerMorph and run ALPACA on my windows computer and everything worked as expected. I wonder if you have antivirus or centrally managed something that removes files. All I can say maybe try with a different computer
Python 3.12.10 (main, Feb 12 2026, 15:11:32) [MSC v.1944 64 bit (AMD64)] on win32
>>>
[Qt] libpng warning: iCCP: profile 'ICC Profile': 'CMYK': invalid ICC profile color space
[Qt] libpng warning: iCCP: known incorrect sRGB profile
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You were right my antivirus was the cause of the problem now everything works fine.