How To Fix DMC_MDS_MAINT_EVENT020 - No files written to db &1

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_MDS_MAINT_EVENT - message class for dynamic maint event proc

• Message number: 020

• Message text: No files written to db &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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_MDS_MAINT_EVENT020 - No files written to db &1 ?

  The SAP error message DMC_MDS_MAINT_EVENT020 with the description "No files written to db &1" typically occurs in the context of data management and data migration processes within SAP systems, particularly when using the Data Migration Cockpit (DMC) or similar tools.
  Cause:
  This error generally indicates that the system attempted to write data to the database, but no files were successfully written. Possible causes include:
  
  Data Source Issues: The source data may be empty or not properly formatted, leading to no records being available for processing.
  Mapping Errors: There may be issues with the data mapping configuration, causing the system to skip writing operations.
  Database Constraints: Constraints or restrictions in the target database (e.g., primary key violations, foreign key constraints) may prevent data from being written.
  Authorization Issues: The user executing the data migration may lack the necessary permissions to write to the database.
  Technical Errors: There could be underlying technical issues, such as connectivity problems with the database or issues with the DMC itself.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  Check Source Data: Verify that the source data is present and correctly formatted. Ensure that the data you are trying to migrate is not empty.
  Review Mapping Configuration: Check the mapping settings in the DMC to ensure that all fields are correctly mapped and that there are no errors in the configuration.
  Examine Database Constraints: Review the target database schema for any constraints that might prevent data from being written. Ensure that the data being migrated adheres to these constraints.
  Check User Permissions: Ensure that the user executing the migration has the necessary authorizations to write to the target database.
  Review Logs: Check the logs for any additional error messages or warnings that might provide more context about the failure.
  Test with Sample Data: If possible, try migrating a small sample of data to see if the issue persists. This can help isolate whether the problem is with specific records or the overall process.
  Consult Documentation: Refer to SAP documentation or support notes related to the DMC for any known issues or additional troubleshooting steps.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to the DMC and this specific error message. SAP frequently updates its knowledge base with solutions to common problems.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  System Logs: Review system logs (transaction codes like SLG1) for any related error messages that could provide further insights into the problem.
  
  If the issue persists after following these steps, consider reaching out to SAP support for more specialized assistance.