How To Fix RSR_TRANS027 - Tag '&1' is not allowed if tag '&2' has type '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: RSR_TRANS -

• Message number: 027

• Message text: Tag '&1' is not allowed if tag '&2' has type '&1'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSR_TRANS027 - Tag '&1' is not allowed if tag '&2' has type '&1' ?

  The SAP error message RSR_TRANS027 indicates that there is a problem with the tags used in a transformation or data transfer process in SAP BW (Business Warehouse). Specifically, it suggests that a tag (denoted as '&1') is not allowed when another tag (denoted as '&2') has a specific type (also denoted as '&1'). This typically occurs in the context of data transformations where the data types or structures are not compatible.
  Cause:
  
  Incompatible Data Types: The error usually arises when there is a mismatch between the expected data type of a field and the actual data type being used. For example, if a field is expected to be a numeric type but is being treated as a character type, this error may occur.
  Incorrect Mapping: The transformation rules may have been incorrectly defined, leading to an attempt to use a tag that is not valid for the specified data type.
  Configuration Issues: There may be issues in the configuration of the InfoObjects or the transformation itself, such as incorrect settings or missing definitions.
  
  Solution:
  
  Check Transformation Rules: Review the transformation rules in the Data Transfer Process (DTP) or the transformation itself. Ensure that the mappings between source and target fields are correct and that the data types align.
  Validate InfoObjects: Check the definitions of the InfoObjects involved in the transformation. Ensure that the data types are correctly defined and that there are no discrepancies.
  Adjust Tags: If the error message specifies certain tags, review their usage in the transformation. Make sure that the tags being used are appropriate for the data types involved.
  Test with Sample Data: Run tests with sample data to identify if the issue persists. This can help isolate the problem and confirm whether the changes made resolve the issue.
  Consult Documentation: Refer to SAP documentation or notes related to the specific error message for additional context and troubleshooting steps.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on transformations and data types.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench) and RSCONN01 (Connection Management) for managing transformations and data flows.
  
  By following these steps, you should be able to identify the root cause of the RSR_TRANS027 error and implement a solution to resolve it.