How To Fix RSRTS_CDS231 - Function &1: Expression not supported as argument

SAP Error Message - Details

• Message type: E = Error

• Message class: RSRTS_CDS - Messages Transient CDS Queries

• Message number: 231

• Message text: Function &1: Expression not supported as argument

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSRTS_CDS231 - Function &1: Expression not supported as argument ?

  The SAP error message RSRTS_CDS231 with the description "Function &1: Expression not supported as argument" typically occurs in the context of using SAP BW (Business Warehouse) or SAP HANA when working with CDS (Core Data Services) views or when executing queries in the SAP BW Query Designer.
  Cause:
  This error generally arises due to the following reasons:
  
  
  Unsupported Functions: The function or expression you are trying to use in your query or calculation is not supported in the context of the CDS view or the specific query execution environment.
  
  
  Data Type Mismatch: There may be a mismatch in the expected data types for the arguments being passed to a function. For example, if a function expects a numeric value but receives a string, this can trigger the error.
  
  
  Complex Expressions: Some complex expressions or calculations may not be supported in the context of the query or the underlying data model.
  
  
  Query Design Issues: The way the query is designed, including the selection of fields, filters, or aggregations, may lead to unsupported expressions.
  
  
  Solution:
  To resolve the RSRTS_CDS231 error, you can take the following steps:
  
  
  Review the Function: Check the function or expression that is causing the error. Ensure that it is supported in the context of your CDS view or query. Refer to the SAP documentation for the specific functions and their usage.
  
  
  Check Data Types: Verify that the data types of the arguments being passed to the function are correct and compatible. If necessary, perform type conversions to ensure compatibility.
  
  
  Simplify Expressions: If you are using complex expressions, try simplifying them. Break down the expression into smaller parts and test each part individually to identify which part is causing the issue.
  
  
  Modify Query Design: Review the design of your query in the Query Designer. Ensure that the fields, filters, and aggregations are correctly set up and do not lead to unsupported expressions.
  
  
  Consult SAP Notes: Check for any relevant SAP Notes or updates that may address this specific error. SAP frequently releases updates and patches that may resolve known issues.
  
  
  Testing: After making changes, test the query again to see if the error persists. If it does, continue to refine your approach based on the feedback from the system.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for BW and CDS views for detailed information on supported functions and expressions.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  SAP Support: If the issue persists and you have access to SAP Support, consider opening a support ticket for further assistance.
  
  By following these steps, you should be able to identify the cause of the RSRTS_CDS231 error and implement a suitable solution.