How To Fix NRSCNV125 - Simulation not possible; background job cannot be scheduled

SAP Error Message - Details

• Message type: E = Error

• Message class: NRSCNV - Message class

• Message number: 125

• Message text: Simulation not possible; background job cannot be scheduled

What causes this issue?

For some reason<(>,<)> a batch job that would execute the simulation in
another session cannot be scheduled.

System Response

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

How to fix this error?

Enter 'nobatch' in the transaction field and start the simulation again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message NRSCNV125 - Simulation not possible; background job cannot be scheduled ?

  The SAP error message NRSCNV125, which states "Simulation not possible; background job cannot be scheduled," typically occurs in the context of running a simulation for a conversion or migration process in SAP. This error indicates that the system is unable to schedule a background job necessary for the simulation.
  Causes:
  
  
  Background Job Scheduling Issues: The system may be unable to schedule the background job due to various reasons, such as:
  
  Background processing is disabled.
  The job scheduling queue is full or has reached its limit.
  There are issues with the job server or the job processing environment.
  
  
  
  Authorization Issues: The user may not have the necessary authorizations to schedule background jobs.
  
  
  System Configuration: There may be configuration issues in the SAP system that prevent the scheduling of background jobs.
  
  
  Resource Limitations: The system may be experiencing resource limitations, such as memory or CPU constraints, which can prevent job scheduling.
  
  
  Job Definition Issues: The job definition for the simulation may be incorrect or incomplete.
  
  
  Solutions:
  
  
  Check Background Job Configuration:
  
  Ensure that background processing is enabled in the system.
  Check the job scheduling queue to see if it is full or if there are any errors in the job server configuration.
  
  
  
  Review Authorizations:
  
  Verify that the user has the necessary authorizations to create and manage background jobs. This can be done by checking the user's roles and authorizations in the SAP system.
  
  
  
  Monitor System Resources:
  
  Check the system's resource usage (CPU, memory, etc.) to ensure that it is not overloaded. You can use transaction codes like ST02 (Tune Summary) or ST06 (Operating System Monitor) to monitor system performance.
  
  
  
  Check Job Definitions:
  
  Review the job definition for the simulation process to ensure that it is correctly configured. This includes checking the job steps, variants, and any parameters that may be required.
  
  
  
  Consult SAP Notes:
  
  Look for relevant SAP Notes that may address this specific error. SAP Notes often provide patches or workarounds for known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide more specific guidance based on your system configuration and the context of the error.
  
  
  
  Related Information:
  
  Transaction Codes: You may find it helpful to use transaction codes such as SM37 (to monitor background jobs) and SM21 (to check system logs) to gather more information about the error.
  SAP Documentation: Refer to the official SAP documentation for the specific module or process you are working with, as it may provide additional insights into the error and its resolution.
  Community Forums: SAP Community and other forums can be valuable resources for finding similar issues faced by other users and their solutions.
  
  By following these steps, you should be able to diagnose and resolve the NRSCNV125 error in your SAP system.