How To Fix CNV_OM_PRESEL303 - Communication failure: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_OM_PRESEL - Messages for LT Object Based Preselection

• Message number: 303

• Message text: Communication failure: &1

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_OM_PRESEL303 - Communication failure: &1 ?

  The SAP error message CNV_OM_PRESEL303 with the description "Communication failure: &1" typically occurs during data migration or conversion processes, particularly when using the SAP Landscape Transformation (SLT) or other data migration tools. This error indicates that there is a communication issue between the source and target systems or within the data migration framework itself.
  Causes:
  
  Network Issues: There may be network connectivity problems between the source and target systems.
  Configuration Errors: Incorrect configuration settings in the data migration tool or in the SAP systems can lead to communication failures.
  Authorization Issues: The user or service account used for the migration may not have the necessary permissions to access the required data.
  Service Availability: The required services or background jobs may not be running or may have failed.
  Timeouts: Long-running processes may exceed timeout settings, leading to communication failures.
  Data Format Issues: Incompatibilities in data formats or structures between the source and target systems can also cause communication problems.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is stable network connectivity between the source and target systems. You can use tools like ping or traceroute to diagnose network issues.
  Review Configuration Settings: Verify the configuration settings in the data migration tool and ensure they are correctly set up for both the source and target systems.
  Check Authorizations: Ensure that the user or service account has the necessary authorizations to perform the migration tasks.
  Monitor Services: Check if all required services and background jobs are running properly. Restart any failed services if necessary.
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the relevant configuration.
  Validate Data Formats: Ensure that the data formats and structures are compatible between the source and target systems. Perform data validation checks if necessary.
  
  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 data migration tool and the SAP systems to gather more details about the error.
  SAP Community: Engage with the SAP Community forums for discussions and solutions shared by other users who may have encountered similar issues.
  Documentation: Refer to the official SAP documentation for the specific data migration tool you are using for best practices and troubleshooting steps.
  
  If the issue persists after trying the above solutions, it may be beneficial to contact SAP support for further assistance.