How To Fix UCT8204 - Mapping rule for &1: Offset and length invalid

SAP Error Message - Details

• Message type: E = Error

• Message class: UCT8 - Message class for UCT8(mapping)

• Message number: 204

• Message text: Mapping rule for &1: Offset and length invalid

What causes this issue?

The mapping rule for target field &V1& contains a move with a concatenat
ion rule. However, the offset and the length for the concatenation
component &V2& are invalid (for example, because the offset exceeds the
boundary of the actual data, or because the length equals zero). The
mapping rule for concatenation component &V2& is presumably defined
incorrectly.

System Response

The system will not execute the mapping rule for target field &V1&.

How to fix this error?

Examine the mapping rule for target field &V1& and change the offset and
length for concatenation component &V2&. Execute the method again.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UCT8204 - Mapping rule for &1: Offset and length invalid ?

  The SAP error message UCT8204, which states "Mapping rule for &1: Offset and length invalid," typically occurs in the context of data mapping or transformation processes, particularly when working with data transfer or integration scenarios. This error indicates that there is an issue with the mapping rule defined for a specific field or data element, specifically regarding the offset and length parameters.
  Cause:
  
  Invalid Offset or Length: The offset or length specified in the mapping rule is either negative, exceeds the length of the source data, or is not properly defined.
  Data Structure Changes: Changes in the data structure or format of the source data may lead to mismatches in the expected offset and length.
  Configuration Errors: Incorrect configuration in the mapping rules or transformation logic can lead to this error.
  Data Type Mismatch: The data type of the source field may not match the expected data type in the target field, leading to issues in mapping.
  
  Solution:
  
  Check Mapping Rules: Review the mapping rules for the specific field indicated by &1 in the error message. Ensure that the offset and length values are correctly defined and within the valid range.
  Validate Data Structure: Ensure that the source data structure has not changed. If there have been changes, update the mapping rules accordingly.
  Adjust Offset and Length: If the offset or length is incorrect, adjust these values to ensure they are valid. The offset should be within the bounds of the source data, and the length should not exceed the remaining length of the data from the offset position.
  Test with Sample Data: Use sample data to test the mapping rules and ensure that they work as expected without triggering the error.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on defining mapping rules and handling offsets and lengths.
  Debugging: If the issue persists, consider using debugging tools to trace the data flow and identify where the mapping rule is failing.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Data Mapping Documentation: Review SAP documentation on data mapping and transformation processes for best practices and examples.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the UCT8204 error in your SAP environment.