How To Fix /SAPPO/MSG326 - &1 is not a valid function module for the detail screen

/SAPPO/MSG326 - Overview

• Message type: E = Error

• Message class: /SAPPO/MSG -

• Message number: 326

• Message text: &1 is not a valid function module for the detail screen

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPPO/MSG326 - &1 is not a valid function module for the detail screen ?

  The SAP error message /SAPPO/MSG326 &1 is not a valid function module for the detail screen typically indicates that the system is trying to call a function module that does not exist or is not correctly defined in the system. This error is often encountered in the context of custom developments or enhancements in SAP, particularly when dealing with custom function modules or when integrating with other systems.
  Causes:
  
  Non-existent Function Module: The function module specified in the error message does not exist in the SAP system.
  Incorrect Configuration: The configuration settings for the application or module may be pointing to an incorrect or outdated function module.
  Authorization Issues: The user may not have the necessary authorizations to access the specified function module.
  Transport Issues: If the function module was recently transported from another system, it may not have been transported correctly or may be missing dependencies.
  Custom Development: If the function module is custom-developed, it