DSXchange

I am using DataStage SAP packs.I need to call a RFC enabled function module.I need to pass some input parameters to it and capture the results from the call.Based on the result I need to do some other processing.
Since I found BAPI stage can have either input or output link, so how shd I use the BAPI stage :

BAPI -> File Or File -> BAPI

I'm having the same scenario. I have tried BAPI -> File sucessfully with import parameters, but unsuccesfully when I need to complete a table as Input, and another table as Export

Did you encounter the same problem?

Thanks,
Gaby