How To Fix CPPEMIG345 - Internal error when writing mapping in the migration table

SAP Error Message - Details

• Message type: E = Error

• Message class: CPPEMIG - Migration of BOM and Routing to iPPE

• Message number: 345

• Message text: Internal error when writing mapping in the migration table

What causes this issue?

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

System Response

For all routings that are successfully migrated, the old and new keys
are saved in a database table. This enables you to see which objects
have been migrated. DUring migration, the system accesses this table to
assign materials to routings.
This information is important in order to (a) recognize which objects
have been migrated, and (b) assign materials to routings.
To guarantee consistency, all entries from as routing are deleted from
the database, if an entry could not be added. The system continues
migration with the next routing.

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 CPPEMIG345 - Internal error when writing mapping in the migration table ?

  The SAP error message CPPEMIG345, which indicates an "Internal error when writing mapping in the migration table," typically arises during data migration processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error can be caused by various factors, including issues with the data being migrated, configuration problems, or system-related issues.
  Possible Causes:
  
  Data Integrity Issues: The data being migrated may have inconsistencies or integrity issues that prevent it from being written to the migration table.
  Configuration Errors: Incorrect configuration settings in the migration cockpit or related tools can lead to this error.
  System Performance: If the system is under heavy load or if there are performance issues, it may lead to internal errors during the migration process.
  Authorization Issues: Lack of proper authorizations for the user executing the migration can also trigger this error.
  Software Bugs: There may be bugs in the version of the SAP software being used, which could lead to unexpected internal errors.
  
  Solutions:
  
  Check Data Quality: Review the data being migrated for any inconsistencies or errors. Ensure that all required fields are populated and that the data adheres to the expected formats.
  Review Configuration: Double-check the configuration settings in the migration cockpit. Ensure that all necessary parameters are correctly set.
  Monitor System Performance: Check the system performance and resource utilization. If the system is under heavy load, consider running the migration during off-peak hours.
  User Authorizations: Verify that the user executing the migration has the necessary authorizations to write to the migration table.
  Check for Software Updates: Ensure that you are using the latest version of the SAP software. If not, consider applying the latest patches or updates that may address known bugs.
  Review Logs: Check the application logs (transaction SLG1) for more detailed error messages that can provide additional context about the issue.
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including any logs or screenshots.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide guidance on similar issues.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit for best practices and troubleshooting tips.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the root cause of the CPPEMIG345 error and implement a suitable solution.