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Message type: E = Error
Message class: SY - ABAP/4 system messages
Message number: 107
Message text: Event is not a PBO/PAI module. Start not allowed
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SY107
- Event is not a PBO/PAI module. Start not allowed ?The SAP error message SY107: Event is not a PBO/PAI module. Start not allowed typically occurs when there is an attempt to trigger a process that is not defined as a Process Before Output (PBO) or Process After Input (PAI) module in an ABAP program. This error is often encountered in the context of screen programming in SAP, particularly when working with dialog programs.
Cause:
- Incorrect Event Handling: The event you are trying to trigger is not defined in the program as a PBO or PAI module. This can happen if you are trying to call a module that is not associated with the screen's flow logic.
- Screen Flow Logic Issues: The screen might not be properly defined in the flow logic, or the event you are trying to call does not exist in the program.
- Typographical Errors: There may be a typo in the event name or the module name you are trying to call.
- Program Structure: The program might not be structured correctly to handle the events you are trying to trigger.
Solution:
- Check Event Definitions: Ensure that the event you are trying to call is defined in the program. Look for the PBO and PAI modules in the program and verify that they are correctly defined.
- Review Flow Logic: Open the screen in the Screen Painter and check the flow logic. Make sure that the events you are trying to trigger are properly linked to the corresponding modules.
- Correct Typographical Errors: Double-check the spelling of the module names and ensure that they match exactly with the definitions in the program.
- Debugging: Use the debugger to trace the program execution and identify where the error occurs. This can help you understand if the program is trying to call an undefined module.
- Consult Documentation: If you are unsure about the correct event handling, refer to SAP documentation or resources related to screen programming and dialog processing.
Related Information:
By following these steps, you should be able to identify the cause of the SY107 error and implement the necessary corrections to resolve it.
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