How To Fix FDT_EXPRESSIONS654 - Invalid index &1 at sequence position &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 654

• Message text: Invalid index &1 at sequence position &2

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS654 - Invalid index &1 at sequence position &2 ?

  The SAP error message FDT_EXPRESSIONS654 with the description "Invalid index &1 at sequence position &2" typically occurs in the context of using the SAP Fiori or SAP S/4HANA applications that involve expressions or calculations in the context of data transformation or field mapping.
  Cause:
  This error generally indicates that there is an issue with the indexing of elements in a sequence or an array. Specifically, it suggests that the index specified (represented by &1) is not valid for the sequence position indicated (represented by &2). This can happen due to several reasons, such as:
  
  Out-of-Bounds Indexing: The index being referenced is either negative or exceeds the number of elements in the sequence.
  Incorrect Configuration: There may be a misconfiguration in the data transformation or mapping logic where the sequence is not properly defined.
  Data Integrity Issues: The data being processed may not conform to the expected structure, leading to invalid references.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  Check Index Values: Review the logic where the index is being set or used. Ensure that the index is within the valid range of the sequence or array.
  Validate Data Structure: Ensure that the data structure being processed is correctly defined and populated. Check for any missing or null values that could lead to invalid indexing.
  Review Configuration: If this error arises from a specific configuration (like a data transformation or mapping), review the configuration settings to ensure they are correct and that all necessary elements are defined.
  Debugging: If possible, use debugging tools to step through the code or logic that leads to this error. This can help identify where the invalid index is being generated.
  Consult Documentation: Refer to SAP documentation or community forums for any known issues or additional guidance related to this specific error message.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any patches or updates related to this error. Sometimes, specific issues are documented with solutions or workarounds.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered the same issue and what solutions they found effective.
  Testing: After making changes, thoroughly test the application to ensure that the error is resolved and that no new issues have been introduced.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the context in which the error occurs.