ABAP Dump due to RFC Function module call in another thread

Hi,

I am facing some problem since yesterday. In one of my executable program I am calling a RFC fm as below mentioned

REPORT ZREPORT.

CALL FUNCTION 'Z_XXXXXXXXX'

STARTING NEW TASK L_NAME

DESTINATION IN GROUP 'TASK'

PERFORMING RETURN_INFO ON END OF TASK

EXPORTING

P_exp1 = l_emp

TABLES

R_VBELN = r_it_vbeln

EXCEPTIONS

NO_DATA_TO_PROCESS = 1

OTHERS = 2.

wait until v_task = 1.

update ztable.

Due to some data inconsistence one of the SAP function

module which I am calling in my function module Z_XXXXXXXXX

is generating dump with message type X. Since there is data inconsistence it is generating dump that's OK.

But the problem i am getting is, report ZREPORT is generating dump at WAIT statement saying illegal statement even though I am calling that function module

Z_XXXXXXXXX as a separate new task.

Can somebody help me.

Thanks,

Amara.