How To Fix /SAPAPO/RSP_INFO204 - Subprocess can not be carried out due to parallel subprocess

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/RSP_INFO -

• Message number: 204

• Message text: Subprocess can not be carried out due to parallel subprocess

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/RSP_INFO204 - Subprocess can not be carried out due to parallel subprocess ?

  The SAP error message /SAPAPO/RSP_INFO204 indicates that a subprocess cannot be executed because there is another parallel subprocess currently running. This is a common issue in SAP Advanced Planning and Optimization (APO) when multiple processes are trying to access the same resources or data simultaneously.
  Cause:
  
  Concurrent Execution: The error typically arises when two or more processes are trying to execute at the same time, which can lead to conflicts in resource allocation or data access.
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If one process has locked a resource, other processes trying to access that resource will be blocked until the lock is released.
  Long-Running Processes: If a subprocess takes longer than expected to complete, it can lead to other subprocesses being queued or blocked.
  
  Solution:
  
  Check Running Processes: Use transaction codes like SM37 (Job Monitoring) to check for any long-running or stuck jobs. If you find any, you may need to terminate or wait for them to complete.
  Adjust Scheduling: If you frequently encounter this issue, consider adjusting the scheduling of your jobs to avoid overlaps. This can be done by staggering the execution times of the subprocesses.
  Increase Resources: If the issue is due to resource contention, consider increasing the system resources (CPU, memory) to handle more parallel processes.
  Review Locking Settings: Check the locking settings in your APO system. You may need to adjust the configuration to allow for more parallel processing if your business processes allow it.
  Error Handling: Implement error handling in your process flows to manage situations where subprocesses cannot be executed due to locks.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to this error message for any specific patches or updates that may address the issue.
  Documentation: Review the SAP APO documentation for best practices on managing subprocesses and parallel processing.
  System Monitoring: Regularly monitor system performance and job execution to identify patterns that may lead to this error.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.