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Short Reference

Other versions: 7.31 | 7.40 | 7.54

Obsolete Syntax

                   | {USING bdc_tab [MODE mode]} ]
                   [EXPORTING p1 FROM a1 p2 FROM a2 ...]
                   [IMPORTING p1 TO a1 p2 TO a2 ...].



2. ... USING bdc_tab [MODE mode]

3. ... EXPORTING p1 FROM a1 p2 FROM a2 ...

4. ... IMPORTING p1 TO a1 p2 TO a2 ...


The statement CALL DIALOG calls the dialog module whose name is contained in the character-like data object dialog. The data object dialog must contain the name in uppercase. If the dialog module specified in dialog is not found, an exception that cannot be handled is raised.
When calling the dialog module, the assigned ABAP program is loaded in a new internal session. The session of the calling program is still available. In contrast to CALL TRANSACTION, the called program runs in the same SAP LUW as the calling program.

After loading the ABAP program, the event LOAD-OF-PROGRAM is triggered and the screen defined as the initial screen of the dialog module is called. The dialog module is terminated when the corresponding screen sequence terminates upon reaching the next screen with screen number 0 or the program is exited using the statement LEAVE PROGRAM.


Dialog modules are the only language resource that can be used to open a new internal session without changing the SAP LUW. Be aware of the following:

  • The statements COMMIT WORK and ROLLBACK WORK cause database commits or database rollbacks in the called program.
  • The statement COMMIT WORK starts the transactional remote function calls registered in the dialog module with CALL FUNCTION IN BACKGROUND. If tRFC or qRFC are registered in a dialog module and are not started with COMMIT WORK, then they are not executed by the COMMIT WORK of the caller.
  • The procedures registered with CALL FUNCTION IN UPDATE TASK and PERFORM ON {COMMIT|ROLLBACK} are only executed with the corresponding statements COMMIT WORK and ROLLBACK WORK in the calling program.
  • Changes to persistent objects of the object services cannot be committed while CALL DIALOG is being executed. Changes made in the object services compatibility mode can be committed later using COMMIT WORK. On the other hand, calling the method END of a top-level transaction called in the program (of the object-oriented transaction mode) does not have any effect, either during or after CALL DIALOG. In object-oriented transaction mode, a transaction must be called before CALL DIALOG and then completed.
  • In the called program, SAP locks are adopted by the caller.

Addition 1



Under the same conditions as for the statement CALL TRANSACTION, this addition surpresses the display of the screen of the initial screen. If the called dialog module has input parameters for the obligatory input fields of the initial screen, they can also be filled using a parameter transfer instead of SPA/GPA parameters.

Addition 2

... USING bdc_tab [MODE mode]


This addition controls the called program as in the statement CALL TRANSACTION by specifying a batch input table bdc_tab of the row type BDCDATA. In this case, only MODE can be used as an addition for the control of the processing.
If a message is sent in the called program, this message is available in the system fields sy-msgid, sy-msgty, sy-msgno, sy-msgv1, ..., sy-msgv4 after the call.

Addition 3

... EXPORTING p1 FROM a1 p2 FROM a2 ...

Addition 4

... IMPORTING p1 TO a1 p2 TO a2 ...


+These additions can be used to assign the appropriate actual parameters a1, a2, ... to the formal parameters p1, p2, ... of the dialog module. The formal parameters of a dialog module are always optional. They can have all data types except for reference types.
When loading the called program, the values of the actual parameters are assigned to the global data objects of the called program that are defined as formal parameters. If this data is associated with screen fields of the same name, they are not overwritten by possible SPA/GPA parameters.
If you specify IMPORTING, the system field sy-subrc is implicitly adopted by the called dialog module and unknown formal parameters are ignored by the system.


Outside of classes, the additions FROM a1, FROM a2, ... und TO a1, TO a2, ... in the parameter lists can be omitted if the formal parameters and actual parameters have the same names.


Non-Catchable Exceptions

  • Cause: Parameter name is too long.
  • Cause: The called dialog module is unknown.
    Runtime Error: CALL_DIALOG_NOT_FOUND
  • Cause:The called dialog module contains errors (incorrect entry in table TDCT).
  • Cause: No further paging area for parameter transfer available.
  • Cause: The statement CALL DIALOG ... SCREEN ... PROGRAM ... is not supported.


Call Dialog Module