Control has return after EXPORT it_final TO MEMORY ID mem to ZREPORT_A

Hi Expert,

          I want a run program called ZREPORT_B from ZREPORT_A using submit syntax to get IT_FINAL internal table data of report_b.

condition:

1. I don't want run the ZREPORT_B beyond IT_FINAL TABLE. then control has to return ZREPORT_A to run & get result.

2. whenever user runs ZREPORT_B there shouldn't be any problem for  REPORT_B.

eg code:

       Need write code as below..

          EXPORT it_final TO MEMORY ID mem

          then control has to go REPORT_A to get output.

What would be approach to CONTROL & EXPORT CODE MUST WORK.

Thanks

Shree.