issue when attaching PO into email

Hello all,

I want to attach the PO in the email.

I called FM  'SSF_FUNCTION_MODULE_NAME' to get the form's name as follow:

CALL FUNCTION 'SSF_FUNCTION_MODULE_NAME'

   EXPORTING

     formname           = l_form

   IMPORTING

     fm_name            = v_form_name

   EXCEPTIONS

     no_form            = 1

     no_function_module = 2

     OTHERS             = 3.

But when i tried to call FM v_form_name as below, i got an issue. In fact it couldn't be executed and didn't dump either.

w_ctrlop-getotf = 'X'.

w_ctrlop-no_dialog = 'X'.

w_ctrlop-preview = space.

w_compop-tddest = 'LOCL'.

* w_compop-tdnoprev  = 'X'.

CALL FUNCTION v_form_name

   EXPORTING

     control_parameters = w_ctrlop

     output_options     = w_compop

     user_settings      = space

   IMPORTING

   job_output_info      = w_return

   EXCEPTIONS

     formatting_error   = 1

     internal_error     = 2

     send_error         = 3

     user_canceled      = 4

     OTHERS             = 5.

Could you please help me to figure out the cause of this problem.

thanks,

Meriem.