How To Fix DMEE454 - Line &1: no assignment possible starting at position &2

SAP Error Message - Details

• Message type: E = Error

• Message class: DMEE - Messages for Data Medium Exchange Engine

• Message number: 454

• Message text: Line &1: no assignment possible starting at position &2

What causes this issue?

The contents of line &V1& starting at position &V2& cannot be assigned
to a node since the corresponding segment &V3& has already been
processed completely.
The non-assigned character string has a length of &V4&.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMEE454 - Line &1: no assignment possible starting at position &2 ?

  The SAP error message DMEE454 typically occurs in the context of the Data Medium Exchange Engine (DMEE) when generating payment files or other data formats. This error indicates that there is an issue with the assignment of fields in the DMEE tree structure, specifically that the system cannot assign a value to a field starting at a specified position.
  Cause:
  
  Incorrect Field Mapping: The error often arises when the mapping of fields in the DMEE tree is not correctly defined. This could be due to a mismatch between the expected data structure and the actual data being processed.
  Data Length Issues: The length of the data being assigned may exceed the defined length for the target field, leading to an inability to assign the value.
  Missing Data: If the data source does not provide the necessary information for the specified position, the assignment cannot be completed.
  Configuration Errors: There may be errors in the configuration of the DMEE tree or the associated payment method settings.
  
  Solution:
  
  Check DMEE Tree Configuration: Review the DMEE tree structure to ensure that all fields are correctly defined and mapped. Pay special attention to the field lengths and data types.
  Validate Data Source: Ensure that the data source (e.g., payment documents) contains all the necessary information and that the data is in the expected format.
  Adjust Field Lengths: If the data being assigned exceeds the defined length, consider adjusting the field lengths in the DMEE configuration to accommodate the data.
  Test with Sample Data: Run tests with sample data to identify where the assignment fails. This can help pinpoint the exact location and cause of the error.
  Consult Documentation: Refer to SAP documentation or notes related to DMEE for any specific guidelines or updates that may address this issue.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like DMEE or OBPM1 to access and modify the DMEE tree configurations.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or fixes related to this error.
  Debugging: If the issue persists, consider using debugging tools to trace the execution and identify where the assignment fails.
  
  By following these steps, you should be able to resolve the DMEE454 error and ensure that your DMEE configurations are correctly set up for generating payment files.