How To Fix CNV_DMC_HC021 - &1 latency occured due to unexpected reasons; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_HC -

• Message number: 021

• Message text: &1 latency occured due to unexpected reasons; see long text

What causes this issue?

Before you active the configuration for this table, the configuration
had been deactivated for a long time the logging table for the table war
not empty. As a result, it takes a longer time than the latency
threshold to replicate the table and a latency error occurs. In this
case, you can ignore the latency.

System Response

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

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 CNV_DMC_HC021 - &1 latency occured due to unexpected reasons; see long text ?

  The SAP error message CNV_DMC_HC021 indicates that there is a latency issue that occurred during a data migration or conversion process, specifically related to the Data Migration Cockpit (DMC). This error can arise due to various unexpected reasons, which may include performance bottlenecks, network issues, or problems with the source or target systems.
  Causes:
  
  Performance Bottlenecks: High load on the source or target system can lead to delays in data processing.
  Network Issues: Latency in network communication between the source and target systems can cause delays.
  Data Volume: Large volumes of data being processed at once can overwhelm the system.
  Configuration Issues: Incorrect configuration settings in the DMC or related systems can lead to inefficiencies.
  Resource Limitations: Insufficient system resources (CPU, memory, etc.) can hinder performance.
  Database Locks: Locks on database tables can prevent timely access to data.
  
  Solutions:
  
  Monitor System Performance: Use monitoring tools to check the performance of both the source and target systems. Look for CPU, memory, and disk usage.
  Check Network Connectivity: Ensure that there are no network issues affecting communication between systems. This can include checking for high latency or packet loss.
  Optimize Data Volume: If possible, break down large data migration tasks into smaller batches to reduce the load on the system.
  Review Configuration Settings: Ensure that the DMC and related systems are configured correctly for optimal performance.
  Increase System Resources: If resource limitations are identified, consider scaling up the system resources (e.g., adding more memory or CPU).
  Database Maintenance: Check for and resolve any database locks or performance issues that may be affecting data access.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error.
  Logs and Traces: Review logs and traces from the DMC and the involved systems to identify specific issues or bottlenecks.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Refer to the official SAP documentation for the Data Migration Cockpit for best practices and troubleshooting tips.
  
  If the issue persists after trying the above solutions, it may be beneficial to contact SAP support for further assistance.