I try to call a function module, but why do I always get an error popup with the following text:

"Error in RFC and lower layer" "TSV_TNEW_OCCURS_NO_ROLL_MEMORY"

Please check the parameters in your call, especially the table parameters.

You have probably passed a table instead of an in/out parameter, or the same table twice. In such cases an error message of this kind is likely to occur.