Hi Sheetal, I see you are using Sandor's script

https://github.com/sandorbx/Parallel-Fij...

so I am afraid that he will have to help you diagnose the issue. I thought you were using the original "munger" script distributed with CMTK and wrapped by

https://github.com/jefferis/fiji-cmtk-gu...

which has the restrictions I mentioned. Best wishes,

Greg.