How To Fix PU191 - Recursive call of activation methods of Switch Framework

SAP Error Message - Details

• Message type: E = Error

• Message class: PU - Upgrade and Transport Log Messages

• Message number: 191

• Message text: Recursive call of activation methods of Switch Framework

What causes this issue?

When the post-import methods ran for request &V1&, Switch Framework
activation methods were called recursively. The name of the method that
was called recursively is &V2&.
This may have been caused by a program error.

System Response

The post-import methods are canceled.

How to fix this error?

Search for SAP Notes using the key word "PU191". These notes will tell
you how to proceed.
If you do not find any relevant notes, contact SAP Customer Support.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PU191 - Recursive call of activation methods of Switch Framework ?

  The SAP error message PU191, which states "Recursive call of activation methods of Switch Framework," typically occurs in the context of the Switch Framework in SAP systems. This error indicates that there is a recursive call happening during the activation of a switch or a related component, which can lead to issues in the activation process.
  Cause:
  
  
  Circular Dependencies: The most common cause of this error is circular dependencies between different switch components or activation methods. This means that one component is trying to activate another component that, in turn, is trying to activate the first component, leading to an infinite loop.
  
  
  Incorrect Configuration: Misconfiguration of the switch framework or the components involved can also lead to this error. This could be due to incorrect settings in the switch framework or issues in the activation logic.
  
  
  Software Bugs: There may be bugs in the SAP software or in the specific version you are using that could lead to this recursive call.
  
  
  Solution:
  
  
  Check Dependencies: Review the dependencies between the switches and components involved. Ensure that there are no circular dependencies. You can use transaction codes like SWITCH or SFW5 to analyze the switch framework and its components.
  
  
  Review Activation Logic: Check the activation methods of the involved components. Ensure that they are not calling each other in a way that creates a loop. You may need to modify the activation logic to prevent this.
  
  
  Update SAP System: If you suspect that the issue is due to a bug in the software, check for any available updates or patches from SAP that might address this issue. Applying the latest support packages or notes can often resolve such problems.
  
  
  Consult SAP Notes: Look for specific SAP Notes related to the error message PU191. SAP frequently publishes notes that provide solutions or workarounds for known issues.
  
  
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for assistance. They can provide more detailed guidance based on your specific system configuration and the context of the error.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SFW5 (Switch Framework) and SFW2 (Switch Framework Configuration) to manage and analyze switch configurations.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their experiences and solutions.
  Documentation: Review the official SAP documentation related to the Switch Framework for best practices and guidelines on managing switches and their dependencies.
  
  By following these steps, you should be able to identify the cause of the PU191 error and implement a solution to resolve it.