How To Fix FDT_CP_MSG408 - Mismatch between source "&1" and target "&2" data objects in "Append"

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CP_MSG -

• Message number: 408

• Message text: Mismatch between source "&1" and target "&2" data objects in "Append"

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 FDT_CP_MSG408 - Mismatch between source "&1" and target "&2" data objects in "Append" ?

  The SAP error message FDT_CP_MSG408 indicates a mismatch between the source and target data objects during an "Append" operation in the context of the SAP Field Data Tool (FDT). This error typically arises when there is an inconsistency in the data structure or data types between the source and target objects that you are trying to append.
  Cause:
  
  Data Type Mismatch: The data types of the fields in the source and target objects do not match. For example, if the source field is of type CHAR and the target field is of type NUMC, this will lead to a mismatch.
  Field Length Differences: The length of the fields in the source and target objects may differ, which can cause issues when trying to append data.
  Incompatible Structures: The structures of the source and target data objects may not be compatible, meaning they do not have the same number of fields or the fields do not correspond correctly.
  Missing Fields: If the target object expects certain fields that are not present in the source object, this can also trigger the error.
  
  Solution:
  
  Check Data Types: Verify that the data types of the fields in both the source and target objects match. If they do not, you may need to adjust the data types in either the source or target object.
  Align Field Lengths: Ensure that the lengths of the fields in the source and target objects are compatible. Adjust the lengths as necessary.
  Review Object Structures: Compare the structures of the source and target objects to ensure they are compatible. Make sure that the fields correspond correctly and that all required fields are present.
  Modify Mapping: If you are using a mapping tool or configuration, ensure that the mapping is set up correctly to handle the data types and structures of both objects.
  Testing: After making adjustments, test the append operation again to see if the error persists.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the Field Data Tool for more detailed information on data object structures and types.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they have found.
  Debugging: If you have access to debugging tools, you can trace the execution to see where the mismatch occurs in the data flow.
  
  By addressing the specific cause of the mismatch, you should be able to resolve the error and successfully perform the append operation.