How To Fix DMC_AP020 - Messages 20-40 are reserved for field mapping

DMC_AP020 - Overview

• Message type: E = Error

• Message class: DMC_AP - MWB: AP specific messages

• Message number: 020

• Message text: Messages 20-40 are reserved for field mapping

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_AP020 - Messages 20-40 are reserved for field mapping ?

  The SAP error message DMC_AP020, which indicates that "Messages 20-40 are reserved for field mapping," typically arises in the context of Data Migration Cockpit (DMC) or when using the SAP S/4HANA Migration Cockpit. This error is related to the mapping of fields during data migration processes.
  
  Cause:
  The error occurs because the system is trying to use message numbers that are reserved for internal purposes related to field mapping. This can happen if there is an issue with the configuration of the migration project, such as:
  
  Incorrect Mapping Configuration: The field mapping might not be set up correctly, leading to conflicts with reserved message numbers.
  Data Structure Issues: The data structure being used for migration may not align with the expected structure in the target system.
  Version Compatibility: There may be compatibility issues between the source and target systems, especially if they are on different versions of SAP.
  
  
  Solution:
  To resolve the DMC_AP020 error, you can take