Create a step "Form" in workflow

Question

Hello!
I want to create forms to enter data for processing in Business Workflow, to display and edit data. I ve got a container element Y_form_makt that refers to a structure MAKT.
I ve got a problem attanching a form using Screen Painter and flow logic of this form. I want to use only "Material number" (matnr) and "Material description" (maktx) data fields, so i deleted some fields in Screen Painter.
A logic of my small worklow is "Workflow started -> "Form: Material information" -> "Mail with a Material information" -> "Workflow ended"
Here is my code from flow logic::
DATA v_matnr TYPE matnr.
          v_maktx TYPE maktx.
*& MODULE IMPORT_DATA_0001 OUTPUT
MODULE import_data_0001 OUTPUT.
  PERFORM import_data_0001
    CHANGING
      makt.
ENDMODULE.           "IMPORT_DATA_0001 OUTPUT
*& MODULE EXPORT_DATA_0001 INPUT
MODULE export_data_0001 INPUT.
  PERFORM export_data_0001
    USING
      makt.
SELECT SINGLE maktx
       FROM makt
       INTO v_maktx
WHERE matnr = v_matnr.
ENDMODULE.                    "EXPORT_DATA_0001 INPUT
*& PROCESS ON VALUE-REQUEST.
*& PROCESS ON HELP-REQUEST.
An error is "At the screen generation it was detected that a screen to be generated has a syntax error or couldn't be generated due to anotther error.... So I can't delete some fields in Screen Painter, I should display all fields from a standard table???

Answer 1

Hi Malika,
You're using changing parameter makt when calling routine 'import_data_0001', though I don't see the variable declaration. Nevertheless, can you paste your flow logic as well, these were just PAI and PBO modules I guess.
Regrads,
KK