BODS calling ECC FM : limitations in volume

          I have written an FM in ECC to load data into a Z-table.  BODS calls the FM via RFC.  What I found out is that the batch job that uses this FM always quits after about 30 minutes saying

"

RFC CallReceive error <Function /BODS/RFC_ABAP_INSTALL_AND_RUN: RFC_COMMUNICATION_FAILURE- connection closed without message

  (CM_NO_DATA_RECEIVED)[SAP NWRFC 720][SAP Partner 740 ][ECC][BODS][hanauser88][4103]>."

This means the FM-method for loading data into ECC via BODS has volume limitations? In this case what are my other options?

Thanks!