How To Fix SY107 - Event is not a PBO/PAI module. Start not allowed

SY107 - Overview

• 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

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 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