How To Fix FDT_EXPRESSIONS121 - Invalid column index &1 in row(s) &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 121

• Message text: Invalid column index &1 in row(s) &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.

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_EXPRESSIONS121 - Invalid column index &1 in row(s) &2 ?

  The SAP error message FDT_EXPRESSIONS121 with the description "Invalid column index &1 in row(s) &2" typically occurs in the context of SAP's Flexible Data Import (FDI) or when working with data expressions in SAP applications. This error indicates that there is an issue with the data being processed, specifically related to the indexing of columns in a data structure (like a table or dataset).
  Cause:
  
  
  Invalid Column Index: The error suggests that the column index specified in the data processing logic is out of bounds. This can happen if:
  
  The column index referenced does not exist in the dataset.
  The dataset has fewer columns than expected.
  There is a mismatch between the expected structure of the data and the actual data being processed.
  
  
  
  Data Structure Changes: If the underlying data structure has changed (e.g., columns added or removed), and the logic still references the old structure, this error can occur.
  
  
  Data Import Issues: When importing data, if the source data file has a different format or structure than what the SAP system expects, it can lead to this error.
  
  
  Solution:
  
  
  Check Column Index: Verify the column index being referenced in the logic. Ensure that it is within the valid range of the dataset. For example, if a dataset has 5 columns, valid indices would be 0 to 4 (if zero-based indexing is used).
  
  
  Review Data Structure: Check the structure of the data being processed. Ensure that it matches the expected structure in the SAP application. If there have been changes to the data structure, update the logic accordingly.
  
  
  Validate Data Source: If the error occurs during data import, validate the source data file. Ensure that it has the correct number of columns and that the data types match the expected types in SAP.
  
  
  Debugging: If you have access to debugging tools, you can step through the code to identify where the invalid index is being referenced. This can help pinpoint the exact location of the issue.
  
  
  Consult Documentation: Review the relevant SAP documentation or help resources for any specific guidelines related to the Flexible Data Import or the specific application you are working with.
  
  
  Contact Support: If the issue persists and you cannot resolve it, consider reaching out to SAP support or your internal IT support team for further assistance.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Community Forums: SAP Community forums can be a valuable resource for finding similar issues faced by other users and potential solutions.
  Training and Documentation: Familiarize yourself with the Flexible Data Import process and best practices to avoid such errors in the future.
  
  By following these steps, you should be able to identify and resolve the cause of the FDT_EXPRESSIONS121 error in your SAP environment.