How To Fix DMCLG556 - DDIC comparison has been started in background

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 556

• Message text: DDIC comparison has been started in background

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG556 - DDIC comparison has been started in background ?

  The SAP error message DMCLG556 indicates that a DDIC (Data Dictionary) comparison has been initiated in the background. This message typically arises during the process of comparing the Data Dictionary objects between different systems or clients, such as during a transport or when performing a system upgrade.
  Cause:
  
  Background Process: The message indicates that a DDIC comparison is running in the background. This can happen when changes are made to the Data Dictionary, and the system needs to ensure that the objects are consistent across the relevant environments.
  Transport Requests: If you are transporting objects from one system to another, the system may automatically start a DDIC comparison to verify that the objects are correctly aligned.
  System Upgrade or Patch: During upgrades or applying patches, the system may perform a DDIC comparison to ensure that all objects are correctly updated.
  
  Solution:
  
  Check Background Jobs: You can check the status of the background job that is performing the DDIC comparison. Use transaction code SM37 to view the job logs and see if it has completed successfully or if there were any issues.
  Wait for Completion: If the comparison is still running, you may need to wait for it to complete. Depending on the size of the Data Dictionary and the number of objects being compared, this process can take some time.
  Review Logs: After the job completes, review the logs for any errors or warnings that may indicate issues with the Data Dictionary objects.
  Manual Comparison: If necessary, you can manually trigger a DDIC comparison using transaction SE11 (Data Dictionary) or SE14 (Database Utility) to ensure that the objects are consistent.
  Consult SAP Notes: If the issue persists or if you encounter specific errors during the comparison, consult the SAP Support Portal for relevant SAP Notes that may address known issues related to DDIC comparisons.
  
  Related Information:
  
  Transaction Codes:
  
  SM37: Monitor Background Jobs
  SE11: Data Dictionary
  SE14: Database Utility
  
  
  SAP Notes: Always check for relevant SAP Notes that may provide additional insights or solutions for specific issues related to DDIC comparisons.
  Documentation: Review SAP documentation regarding Data Dictionary management and transport processes for best practices and troubleshooting steps.
  
  If you continue to experience issues or if the background job fails, it may be necessary to engage SAP support for further assistance.