How To Fix WUSL122 - Maximum number of subroutine pools reached.

SAP Error Message - Details

• Message type: E = Error

• Message class: WUSL - Messages for where-used list

• Message number: 122

• Message text: Maximum number of subroutine pools reached.

What causes this issue?

Transaction SE16N works with subroutine pools. The limit of 36 pools
was exceeded.

System Response

You must restart processing.

How to fix this error?

Restart processing.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WUSL122 - Maximum number of subroutine pools reached. ?

  The SAP error message WUSL122: Maximum number of subroutine pools reached typically occurs when the system has reached the limit of subroutine pools that can be created in the SAP environment. Subroutine pools are used in ABAP programming to group related subroutines together, and there is a maximum limit set by the system configuration.
  Cause:
  
  Excessive Subroutine Pools: The error is usually caused by having too many subroutine pools defined in the system. Each subroutine pool consumes system resources, and when the limit is reached, the system cannot create any new pools.
  Inefficient Coding Practices: Poor coding practices, such as creating unnecessary subroutine pools or not reusing existing ones, can lead to this issue.
  System Configuration: The maximum number of subroutine pools is defined in the system configuration, and it may be set too low for the current usage.
  
  Solution:
  
  
  Review and Optimize Code: 
  
  Check the ABAP code for unnecessary subroutine pools. Consolidate related subroutines into fewer pools where possible.
  Reuse existing subroutine pools instead of creating new ones for similar functionalities.
  
  
  
  Increase the Limit:
  
  If the coding practices are optimal and the limit is still being reached, consider increasing the maximum number of subroutine pools. This can be done by adjusting the relevant parameters in the SAP system configuration.
  The parameter to look for is abap/num_subroutines, which defines the maximum number of subroutine pools. Consult with your SAP Basis administrator to make this change.
  
  
  
  System Cleanup:
  
  Perform a cleanup of unused or obsolete subroutine pools. This can help free up resources and reduce the number of active pools.
  
  
  
  Monitor Usage:
  
  Implement monitoring to keep track of the number of subroutine pools being used. This can help identify trends and prevent the issue from recurring.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific recommendations or patches related to this error. SAP frequently updates its knowledge base with solutions for common issues.
  ABAP Development Guidelines: Follow best practices for ABAP development to avoid creating unnecessary subroutine pools.
  Performance Tuning: Regularly review and tune the performance of your ABAP programs to ensure they are efficient and do not consume excessive resources.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with SAP support or your internal SAP Basis team for further assistance.