User status remains unchanged after UserstatusSet call on AFVC_PM

Hi experts,

I'd like to test this business object AFVC_PM via SWO1 and specially this method "PMorderoperation.UserstatusSet".

But after the execution of this method, the operation status remains unchaged.

When I debug the source code, I can see that the variable STAOBJ ( LIKE ONR00-OBJNR ) is empty after the call of the macro (but RC = 0).

This is probably the reason why the status is not chaged.

SWC_GET_PROPERTY SELF 'StatusObjNumber' STAOBJ.

IF SY-SUBRC NE 0.

  EXIT_RETURN 1000 SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.

ENDIF.

CALL FUNCTION 'STATUS_CHANGE_EXTERN'

     EXPORTING

          CHECK_ONLY          = 'X'

          CLIENT              = SY-MANDT

          OBJNR               = STAOBJ

          USER_STATUS         = ESTAT

          SET_INACT           = STATUSINACTIVE

     EXCEPTIONS

          OBJECT_NOT_FOUND    = 1

          STATUS_INCONSISTENT = 2

So my question is : Is this the right way to test this BO? Or what should I do to get the status changed (in test mode) ?

Thanks in advance for your help.

Juan.