Output problem

Hi Gurus,

I have developed a invoice Smart form. where the smartform is executing well independently.

I am getting Dump when i execute the same Smarform configured with NACE thru the TcodeVF02.

In NACE i am using RLB_INVOICE as Print Output.

Below is the Dump Details which i got. pls help me to solve this.

What happened?

When calling a function module, one of the parmaeters was not

specified.

Error in the ABAP Application Program

The current ABAP program "RLB_INVOICE" had to be terminated because it has

come across a statement that unfortunately cannot be executed.

Error analysis

An exception occurred that is explained in detail below.

The exception, which is assigned to class 'CX_SY_DYN_CALL_PARAM_MISSING', was

not caught in

procedure "PROCESSING" "(FORM)", nor was it propagated by a RAISING clause.

Since the caller of the procedure could not have anticipated that the

exception would occur, the current program is terminated.

The reason for the exception is:

When calling the function module "/1BCDWB/SF00000073", one of the parameters

needed according to the interface description was not specified.

This parameter was "V_VBELN".

Regards,

D.Bharathiraja