How To Fix CNV_DMC_WDA094 - Data transfer is in progress; cannot restart the transfer

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_WDA - Messages used in WDA UI

• Message number: 094

• Message text: Data transfer is in progress; cannot restart the transfer

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_WDA094 - Data transfer is in progress; cannot restart the transfer ?

  The SAP error message CNV_DMC_WDA094 indicates that a data transfer process is currently ongoing, and as a result, you cannot restart the transfer. This error typically occurs in the context of data migration or data transfer activities, particularly when using the SAP Data Migration Cockpit or similar tools.
  Cause:
  
  Ongoing Data Transfer: The primary cause of this error is that a data transfer job is already in progress. This could be due to a previous migration job that has not yet completed.
  Locking Mechanism: SAP systems often implement locking mechanisms to prevent multiple processes from interfering with each other. If a data transfer is active, the system will not allow another transfer to start.
  Session Management: If the user tries to initiate a new transfer without waiting for the current one to finish, this error will be triggered.
  
  Solution:
  
  
  Check Current Transfers: 
  
  Use transaction codes like SM37 (Job Monitoring) to check if there are any active jobs related to data transfer. Look for jobs that are in a "Running" or "Waiting" state.
  If you find an active job, you may need to wait for it to complete.
  
  
  
  Cancel or Terminate the Job: 
  
  If the job is stuck or taking too long, you may consider canceling it. This can be done in SM37 by selecting the job and choosing the option to cancel it.
  Be cautious when canceling jobs, as this may lead to data inconsistencies.
  
  
  
  Review Logs: 
  
  Check the logs for the ongoing data transfer to understand why it is taking longer than expected. This can provide insights into any issues that may need to be addressed.
  
  
  
  Restart the Transfer: 
  
  Once you have confirmed that no other data transfer jobs are running, you can attempt to restart the transfer process.
  
  
  
  System Health Check: 
  
  Ensure that the system is performing optimally and that there are no underlying issues affecting the data transfer process.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM37 (Job Monitoring), SLG1 (Application Log), and ST22 (Dump Analysis) for troubleshooting.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance related to data transfer errors.
  Documentation: Review the official SAP documentation for the Data Migration Cockpit or the specific tool you are using for data transfer to understand best practices and troubleshooting steps.
  
  If the issue persists after following these steps, consider reaching out to your SAP Basis team or SAP support for further assistance.