How To Fix FDT_EXPRESSIONS687 - Result of function &1 in step &2 is not convertible to WA value

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 687

• Message text: Result of function &1 in step &2 is not convertible to WA value

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS687 - Result of function &1 in step &2 is not convertible to WA value ?

  The SAP error message FDT_EXPRESSIONS687 indicates that there is an issue with the conversion of a function result to a WA (Work Area) value in a specific step of a process. This typically occurs in the context of SAP's Flexible Data Import (FDI) or similar data processing scenarios where expressions or functions are evaluated.
  Cause:
  The error can arise due to several reasons:
  
  Data Type Mismatch: The result of the function being executed does not match the expected data type for the WA value. For example, if the function returns a string but the WA expects a numeric value, this error will occur.
  Null or Undefined Values: If the function returns a null or undefined value, and the WA cannot handle such values, this error may be triggered.
  Incorrect Function Logic: The logic within the function may not be correctly implemented, leading to unexpected results that cannot be converted.
  Configuration Issues: There may be issues in the configuration of the data processing steps, leading to incorrect expectations about the data types being handled.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  Check Data Types: Review the data types of the function's output and the expected WA value. Ensure they are compatible. You may need to cast or convert the output to the appropriate type.
  Debug the Function: If you have access to the function's code, debug it to ensure it is returning the expected values. Look for any conditions that might lead to unexpected results.
  Handle Null Values: Implement checks to handle null or undefined values gracefully. Ensure that the function can return a default value if necessary.
  Review Configuration: Check the configuration of the data processing steps to ensure that they are set up correctly and that the expected data types are aligned.
  Consult Documentation: Refer to SAP documentation or community forums for any specific guidelines related to the function or process you are working with.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found.
  Testing: Create test cases to isolate the function and its output to better understand the conditions under which the error occurs.
  
  By following these steps, you should be able to identify the root cause of the error and implement a suitable solution.