Error 6 in function module RSS_PROGRAM_GENERATE

Hi friends,

While testing the extraction of a hierarchy data source (0CMMT_ITEM_FMCI_PU_HIER) from RSA3, I encountered the above error. I looked into some notes and it was not of much help for me. Please let me know if someone have come across this error and know the solution.

Thanks and Regards

Subray Hegde