Hi Aisurya,
First thing that you can check is the sy-subrc for the following code.
lv_exc_msg type string.
Call function <function_name> destination <rfc_destination>
tables
t_output = lt_output .
EXCEPTIONS
system_failure = 1000 MESSAGE lv_exc_msg
communication_failure = 1001 MESSAGE lv_exc_msg
OTHERS = 1002.
If sy-subrc not equal to zero , then check the value of lv_exc_msg.
Apparently this looks like a RFC issue. As