How To Fix CNV_CMIS_A_20501 - Changes will be lost

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_CMIS_A_20 - Message class for Cross-Client Customizing Comparison (SLO)

• Message number: 501

• Message text: Changes will be lost

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_CMIS_A_20501 - Changes will be lost ?

  The SAP error message CNV_CMIS_A_20501 with the description "Changes will be lost" typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there are unsaved changes in the data that you are trying to process, and if you proceed, those changes will be lost.
  Cause:
  
  Unsaved Changes: The most common cause of this error is that there are unsaved changes in the data entry fields or in the migration cockpit that you are working on.
  Session Timeout: If the session has timed out, any changes made may not be saved, leading to this error when trying to proceed.
  Data Validation Issues: Sometimes, the error can also arise if there are validation issues with the data being processed, which may prevent the system from saving changes.
  
  Solution:
  
  Save Changes: Before proceeding with any action that triggers this error, ensure that you save all changes made in the data entry fields. Look for a "Save" button or option in the interface.
  Review Data: Check the data you are working on for any validation errors or issues that may prevent saving. Correct any errors before attempting to save.
  Refresh Session: If you suspect a session timeout, refresh the session or log out and log back in to ensure that you are working with the latest data.
  Backup Data: If possible, back up your data before making significant changes or before running migration processes to prevent data loss.
  Consult Documentation: Refer to the SAP documentation or help resources related to the specific migration tool you are using for any additional troubleshooting steps or best practices.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as understanding how to navigate and use the tool effectively can help prevent such errors.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared by other users.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.