Calling one program from another and gettting values back

Hello All,
I am calling subroutine program X from a payroll function.  I am not able to get internal table back in my payroll program.
This subroutine in program X is being used by some other reports in folLowing way and successfully returns values.Following sysntx is being used in suucessful implemetaiton of this piece of code.
perform fill_rt2 (RPXXXX) USING BEGDA ENDDA PERNR.
If i try doing that from payroll function, rt2 gets refreshed once control comes back to payroll.
Please help.
Thanks
Samir

try this ...
Do not declare RT2 in both programs, only declare it in Calling progrm HNZLCALC0.
Then use perform like this:
perform GET_RESULTS (hnzuclro) using begda endda pernr CHANGING RT2.
and ...
Caller prpgram HNZUCLR0 : rt2 declared here in main program <- remove RT2 from here
FORM GET_RESULTS using begda endda pernr CHANGING RT2
FILL RT2.
ENDFORM.
let me know if it works, I do not have SAP right now, I can check syntax in the morning.

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