I’ve placed patdavid-color-decompose.scm in my scripts folder and tried running it. I get ten layers, LAB-L is the last, and then I get the error message:
Execution error for ‘Color Decompose’:
Error: Procedure execution of plug-in-decompose failed
I suspect I am missing two layers.
This is on a Windows 10 64 bit running GIMP 2.10.6.