How To Fix DMC_MDS_MAINT_EVENT168 - Number of not yet mapped transport requests is NEGATIVE ?!?!

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_MDS_MAINT_EVENT - message class for dynamic maint event proc

• Message number: 168

• Message text: Number of not yet mapped transport requests is NEGATIVE ?!?!

What causes this issue?

The number of not yet mapped transport requests is negative. This is not
expected and normally results from some action that has removed existing
information about transport requests.

System Response

No further mapping is possible.

How to fix this error?

Upload all transport data (E070 etc) again from the files that were
downloaded from the upgrade reference system. Then it should be possible
to repeat this step.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_MDS_MAINT_EVENT168 - Number of not yet mapped transport requests is NEGATIVE ?!?! ?

  The SAP error message DMC_MDS_MAINT_EVENT168 indicating that the "Number of not yet mapped transport requests is NEGATIVE" typically arises in the context of the SAP Data Migration Cockpit (DMC) or during the transport of data between different systems. This error suggests that there is an inconsistency in the transport request mapping process, where the system is trying to reference a negative count of transport requests that have not been mapped.
  Causes:
  
  Inconsistent Data State: The system may have encountered an inconsistency in the data state, possibly due to incomplete or failed transport requests.
  Configuration Issues: There may be issues with the configuration of the transport management system or the DMC settings.
  Database Corruption: In rare cases, database corruption or issues with the underlying data model can lead to negative counts.
  Software Bugs: There may be bugs in the version of the SAP software you are using that lead to incorrect calculations or state management.
  
  Solutions:
  
  Check Transport Requests: Review the transport requests in the system to ensure that they are correctly created, released, and imported. Look for any requests that may be in an inconsistent state.
  Re-map Transport Requests: If possible, try to re-map the transport requests manually to correct any inconsistencies.
  System Restart: Sometimes, a simple restart of the SAP system can resolve temporary inconsistencies.
  Check Logs: Review the application logs (transaction SLG1) for any additional error messages or warnings that could provide more context about the issue.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or patches that address this specific error message. There may be updates or fixes available for your version of SAP.
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including the context in which it occurred and any relevant logs.
  
  Related Information:
  
  SAP Data Migration Cockpit (DMC): This tool is used for data migration projects and can sometimes encounter issues related to transport requests.
  Transport Management System (TMS): Understanding how transport requests are managed in SAP can help in troubleshooting issues related to transport mapping.
  SAP Community: Engaging with the SAP Community forums can provide insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and potentially resolve the error related to negative transport request counts in SAP.