Hi Gergely, 

Thanks for the info! I'm getting this error, even though I confirmed the file is in the expected location: 
"STDERR:Exception in thread "main" java.io.FileNotFoundException: /Applications/QuickNII-ABAMouse-v3-2017.app/Contents/Resources/CCFv3_2020_10um.cutlas
 (No such file or directory)"

I also tried changing pack.txt back to "ABA_Mouse_CCFv3_2017_25um.cutlas" and it returned the same file not found error.