How To Fix FDT_EXPRESSIONS518 - Unknown function &1 used in formula

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 518

• Message text: Unknown function &1 used in 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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS518 - Unknown function &1 used in formula ?

  The SAP error message FDT_EXPRESSIONS518 indicates that there is an unknown function being used in a formula within the context of SAP's Flexible Data Import (FDI) or similar functionalities that utilize expressions. This error typically arises when the system encounters a function in a formula that it does not recognize or that is not defined in the current context.
  Cause:
  
  Typographical Error: The function name may be misspelled or incorrectly formatted.
  Function Not Supported: The function being used may not be supported in the version of SAP you are using or in the specific context of the formula.
  Missing Function Definition: The function may not be defined in the system or may require additional configuration to be recognized.
  Contextual Issues: The function may be valid in one context but not in another, such as being used in a different type of formula or expression.
  
  Solution:
  
  Check for Typos: Review the formula for any spelling mistakes or incorrect syntax in the function name.
  Verify Function Availability: Consult the SAP documentation or help resources to ensure that the function you are trying to use is available and supported in your version of SAP.
  Function Definition: If the function is custom or user-defined, ensure that it has been properly defined and activated in the system.
  Context Review: Ensure that the function is being used in the correct context. Some functions may only be applicable in certain types of calculations or expressions.
  Consult SAP Notes: Check for any relevant SAP Notes or updates that may address this issue or provide additional information about the function in question.
  Testing: If possible, test the formula with a simpler function to isolate the issue and confirm that the formula structure is correct.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for details on available functions and their usage.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed.
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it involves custom functions or configurations.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.