How To Fix FDT_CORE891 - Position &1: functions cannot be assigned to expressions (not supported)

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 891

• Message text: Position &1: functions cannot be assigned to expressions (not supported)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CORE891 - Position &1: functions cannot be assigned to expressions (not supported) ?

  The SAP error message FDT_CORE891 indicates that there is an issue with the assignment of functions to expressions in the context of the SAP Fiori Design Time (FDT) or the Business Rules Framework (BRF+). This error typically arises when you are trying to assign a function to an expression in a way that is not supported by the system.
  Cause:
  The error occurs due to one of the following reasons:
  
  Invalid Function Assignment: You are attempting to assign a function that is not compatible with the expression type you are using.
  Incorrect Expression Type: The expression you are trying to use does not support the function you are trying to assign.
  Syntax Error: There may be a syntax error in the way the function is being called or assigned.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Function Compatibility: Ensure that the function you are trying to assign is compatible with the expression type. Review the documentation for the specific functions and expressions you are using to confirm compatibility.
  
  
  Review Expression Logic: Double-check the logic of your expression. Make sure that you are using the correct syntax and that the expression is structured properly.
  
  
  Use Supported Functions: If the function you are trying to use is not supported in the context of the expression, consider using an alternative function that is compatible.
  
  
  Debugging: If you are unsure where the issue lies, try simplifying the expression or breaking it down into smaller parts to isolate the problem.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific version you are using to understand the limitations and supported features of expressions and functions.
  
  
  Seek Help from SAP Community: If you are still unable to resolve the issue, consider reaching out to the SAP Community or forums for assistance. Provide details about the specific functions and expressions you are using.
  
  
  Related Information:
  
  SAP Fiori Design Time (FDT): This is a framework that allows developers to create and manage Fiori applications.
  Business Rules Framework (BRF+): This is a tool that allows for the definition and management of business rules in SAP applications.
  SAP Notes and Knowledge Base Articles: Check for any relevant SAP Notes or KBA that might address this specific error or provide additional context.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.