How To Fix CNV_DMC_HC020 - &1 - &2: It seems as if data is not being replicated; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_HC -

• Message number: 020

• Message text: &1 - &2: It seems as if data is not being replicated; see long text

What causes this issue?

The system reported that the last replication is more than 600 seconds
in the past. Nevertheless, there are logging table entries which should
be processed. This can indicate that a problem with the replication
exists.

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

System Response

How to fix this error?

In transaction LTRC, you can view the possible causes of the issue. On
the tabs <ZK>Table Overview</> and <ZK>Data Transfer Monitor</>, you can
choose the <ZK>View Errors</> pushbutton. In addition, you can check for
additional health check results on the tab <ZK>Application Logs</> in
transaction LTRC.

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 CNV_DMC_HC020 - &1 - &2: It seems as if data is not being replicated; see long text ?

  The SAP error message CNV_DMC_HC020 typically indicates an issue with data replication during a data migration or conversion process, particularly when using the SAP Data Migration Cockpit (DMC) or related tools. The message suggests that there is a problem with the data not being replicated as expected.
  Cause:
  
  Data Source Issues: The source system may not be configured correctly, or there may be connectivity issues preventing data from being accessed or replicated.
  Mapping Errors: There could be issues with the mapping of fields between the source and target systems, leading to data not being transferred correctly.
  Transformation Logic: If there are transformation rules applied to the data, they may not be functioning as intended, causing data to be skipped or not replicated.
  Technical Errors: There may be underlying technical issues, such as database locks, insufficient permissions, or system resource constraints.
  Configuration Issues: The DMC or related tools may not be configured properly, leading to failures in the replication process.
  
  Solution:
  
  Check Connectivity: Ensure that the connection between the source and target systems is active and properly configured.
  Review Mapping: Verify the mapping of fields between the source and target systems to ensure that all necessary fields are correctly aligned.
  Examine Transformation Rules: Review any transformation logic applied to the data to ensure it is functioning correctly and not inadvertently filtering out data.
  Check Logs: Look at the logs generated during the data migration process for any specific error messages or warnings that can provide more context on the issue.
  Permissions: Ensure that the user executing the migration has the necessary permissions to read from the source and write to the target.
  System Resources: Check the system resources (CPU, memory, disk space) to ensure that there are no constraints affecting the replication process.
  Consult Documentation: Refer to the SAP documentation for the Data Migration Cockpit for any specific troubleshooting steps related to this error message.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the context in which it occurred.
  
  By following these steps, you should be able to identify the root cause of the CNV_DMC_HC020 error and implement a solution to resolve the data replication issue.