How To Fix RSRTS_CDS018 - Expression (at &1) could not be converted into formula

SAP Error Message - Details

• Message type: E = Error

• Message class: RSRTS_CDS - Messages Transient CDS Queries

• Message number: 018

• Message text: Expression (at &1) could not be converted into formula

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSRTS_CDS018 - Expression (at &1) could not be converted into formula ?

  The SAP error message RSRTS_CDS018 indicates that there is an issue with a calculation or expression in a Core Data Services (CDS) view or a query that cannot be converted into a formula. This typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when trying to execute a query that involves complex calculations or expressions.
  Causes:
  
  Invalid Expression Syntax: The expression may contain syntax errors or unsupported functions that cannot be translated into a formula.
  Data Type Mismatch: The data types of the fields involved in the expression may not be compatible, leading to conversion issues.
  Unsupported Operations: Certain operations or functions may not be supported in the context of the query or the underlying data model.
  Changes in Data Model: If there have been recent changes to the underlying data model or CDS view, it may lead to inconsistencies in the expressions used.
  Missing Fields: The expression may reference fields that are not available in the context of the query.
  
  Solutions:
  
  Check Expression Syntax: Review the expression for any syntax errors. Ensure that all functions and operations used are supported in the context of the query.
  Validate Data Types: Ensure that the data types of all fields used in the expression are compatible. You may need to cast or convert data types explicitly.
  Simplify the Expression: If the expression is complex, try breaking it down into simpler components or calculations to identify the problematic part.
  Review Changes: If there have been recent changes to the data model or CDS view, review those changes to ensure they are correctly implemented and do not affect the query.
  Check for Missing Fields: Ensure that all fields referenced in the expression are available in the context of the query. If any fields are missing, update the query or the data model accordingly.
  Use Debugging Tools: Utilize SAP debugging tools or transaction codes like RSRT (Query Monitor) to analyze the query execution and identify where the error occurs.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message RSRTS_CDS018.
  Documentation: Refer to SAP documentation on CDS views and query design for best practices and guidelines.
  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 RSRTS_CDS018 error in your SAP environment.