How To Fix CNVMBT126 - Active phase was changed from &1 to &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBT - Messages for MBT/API/PCL

• Message number: 126

• Message text: Active phase was changed from &1 to &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNVMBT126 - Active phase was changed from &1 to &2 ?

  The SAP error message CNVMBT126, which states "Active phase was changed from &1 to &2," typically occurs during the execution of a migration or conversion process in SAP, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This message indicates that the active phase of the migration process has been altered, which can lead to confusion or issues in the migration workflow.
  Cause:
  
  Manual Intervention: The active phase may have been manually changed by a user, either intentionally or accidentally.
  System Error: An unexpected system error or interruption during the migration process could lead to a phase change.
  Configuration Issues: Incorrect configuration settings or parameters in the migration tool can cause the active phase to change unexpectedly.
  Dependency Issues: If there are dependencies between different phases of the migration process, completing one phase may inadvertently trigger a change in the active phase.
  
  Solution:
  
  Review Logs: Check the migration logs for any errors or warnings that occurred before the phase change. This can provide insight into what caused the change.
  Verify Configuration: Ensure that the migration tool is correctly configured and that all necessary prerequisites for the active phase are met.
  Revert Changes: If the phase change was not intended, you may need to revert to the previous phase and re-execute the necessary steps.
  Consult Documentation: Refer to the official SAP documentation for the migration tool you are using to understand the expected behavior and any known issues related to phase changes.
  Contact SAP Support: If the issue persists and you cannot determine the cause, consider reaching out to SAP Support for assistance. They can provide more specific guidance based on your system configuration and the context of the error.
  
  Related Information:
  
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its phases to understand how the migration process is structured.
  SAP Notes: Search for relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  Community Forums: Engage with the SAP Community or other forums where users may have encountered similar issues. They can offer insights and solutions based on their experiences.
  
  By following these steps, you should be able to identify the cause of the CNVMBT126 error and take appropriate action to resolve it.