How To Fix EA749 - Structure of predecessor type different from passed structure

SAP Error Message - Details

• Message type: E = Error

• Message class: EA - IDoc Basis Messages

• Message number: 749

• Message text: Structure of predecessor type different from passed structure

What causes this issue?

You want to create a new IDoc type as the successor to another
IDoc type.
However, the structure of the predecessor IDoc is not included correctly
in the structure of the successor IDoc.
At least segment &V1& is in the wrong position.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Change the way in which you create the successor IDoc.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message EA749 - Structure of predecessor type different from passed structure ?

  The SAP error message EA749, which states "Structure of predecessor type different from passed structure," typically occurs in the context of data processing or when working with function modules, BAPIs, or other data structures in SAP. This error indicates that there is a mismatch between the expected structure of a data type and the structure that is being passed to it.
  Cause:
  
  
  Data Structure Mismatch: The most common cause of this error is that the structure of the data being passed does not match the expected structure defined in the function module or BAPI. This can happen if:
  
  The fields in the structure do not match (either in name or type).
  The number of fields in the structure is different.
  The data types of the fields do not align (e.g., a field expected to be a character type is passed as a numeric type).
  
  
  
  Changes in Data Dictionary: If there have been recent changes to the data dictionary (e.g., changes to the structure definitions), and the calling program has not been updated accordingly, this error can occur.
  
  
  Incorrect Mapping: If you are using a custom program or an interface, there might be incorrect mapping of fields between the source and target structures.
  
  
  Solution:
  
  
  Check Structure Definitions: Verify the structure definitions in the ABAP Dictionary (transaction SE11) for both the expected structure and the structure being passed. Ensure that they match in terms of field names, types, and lengths.
  
  
  Update Calling Program: If the structure has changed, update the calling program or function module to ensure that it is passing the correct structure. This may involve modifying the data declaration or the way data is populated.
  
  
  Use Data Mapping: If you are working with different structures, consider implementing a mapping layer that converts the data from one structure to the other before passing it to the function module or BAPI.
  
  
  Debugging: Use the ABAP debugger to step through the code and inspect the structures being passed. This can help identify where the mismatch is occurring.
  
  
  Consult Documentation: If you are using standard SAP function modules or BAPIs, refer to the SAP documentation to understand the expected structure and ensure compliance.
  
  
  Related Information:
  
  Transaction Codes: Use SE11 to view and edit data dictionary objects, SE37 for function modules, and SE80 for object navigation.
  SAP Notes: Check SAP Notes for any known issues or updates related to the specific function module or BAPI you are using.
  ABAP Development: Familiarity with ABAP programming and data structures is essential for troubleshooting this error effectively.
  
  By following these steps, you should be able to identify and resolve the cause of the EA749 error in your SAP environment.