How To Fix CNV_NCE_BAS434 - Simulation for number range interval &1 will run during system lock

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 434

• Message text: Simulation for number range interval &1 will run during system lock

What causes this issue?

The number range object &V1& will be split into multiple number range
intervals. This means that the simulation for this number range must run
during the phase <ZK>Preprocessing programs DURING system lock</>.

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

System Response

How to fix this error?

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 CNV_NCE_BAS434 - Simulation for number range interval &1 will run during system lock ?

  The SAP error message CNV_NCE_BAS434 indicates that a simulation for a number range interval is being attempted while the system is in a locked state. This typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools.
  Cause:
  
  System Lock: The system is locked for certain operations, which can happen during data migration, upgrades, or maintenance activities. This lock prevents any changes or simulations from being executed.
  Concurrent Processes: There may be other processes running that are locking the number range intervals, preventing the simulation from proceeding.
  Configuration Issues: There might be misconfigurations in the number range settings or the migration process itself.
  
  Solution:
  
  Check System Lock Status: Verify if the system is indeed locked. You can check transaction codes like SM12 (for lock entries) or SM21 (for system logs) to identify any active locks.
  Wait for Lock Release: If the system is locked due to ongoing processes, you may need to wait until those processes are completed. Once the lock is released, you can retry the simulation.
  Review Migration Settings: Ensure that the number range intervals are correctly configured and that there are no conflicts with other processes.
  Run in Background: If applicable, try running the simulation in the background to avoid conflicts with other user activities.
  Consult SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for further assistance, especially if this is part of a larger migration project.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE37 (Function Module), SE80 (Object Navigator), and ST22 (Dump Analysis) for deeper analysis.
  Documentation: Review SAP documentation related to number range management and data migration processes to ensure compliance with best practices.
  Testing: Before executing any migration or simulation, it’s advisable to perform tests in a development or quality assurance environment to identify potential issues without affecting the production system.
  
  By following these steps, you should be able to address the CNV_NCE_BAS434 error effectively.