dump while calling external subroutine

Hi all,

am getting a short dump while calling external subroutine due to type conflict in the actual and formal parameters,,code is shown below

data: begin of it_error occurs 0.

include structure y_error.

data: end of it_error occurs 0.

perform form2 in program (prog_name) tables it_error.

in prog_name.

form form2 tables p_error type structure y_error.

endform.

In the above code am getting dump saying mismatch in the type of actual and formal parameters ...am using the same type structure for both actual and formal parameters, formal parameters are in standard program

Thanks

John