How To Fix FDT_EXPRESSIONS638 - Invalid selection mode

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 638

• Message text: Invalid selection mode

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_EXPRESSIONS638 - Invalid selection mode ?

  The SAP error message FDT_EXPRESSIONS638: Invalid selection mode typically occurs in the context of using the SAP Fiori Design Studio or when working with expressions in SAP applications. This error indicates that there is an issue with the selection mode specified in your expression or configuration.
  Cause:
  
  Incorrect Selection Mode: The selection mode specified in your expression might not be valid. This could happen if you are trying to use a selection mode that is not supported or incorrectly defined.
  Configuration Issues: There may be issues in the configuration of the data model or the way the expressions are set up.
  Version Compatibility: The error might arise if there are compatibility issues between different versions of SAP components or if the system is not updated.
  
  Solution:
  
  Check Selection Mode: Review the selection mode you are using in your expression. Ensure that it is one of the valid options supported by the system. Common selection modes include "Single", "Multiple", or "None".
  Review Expression Syntax: Ensure that the syntax of your expression is correct. Look for any typos or incorrect parameters that might be causing the issue.
  Consult Documentation: Refer to the official SAP documentation for the specific version you are using to understand the valid selection modes and their usage.
  Update System: If you suspect that the issue is due to version compatibility, check for any available updates or patches for your SAP system and apply them.
  Test in a Different Environment: If possible, try to replicate the issue in a different environment (like a development or test system) to see if the problem persists.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to this error message. SAP Notes often provide specific fixes or workarounds.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues. They can provide insights or solutions based on their experiences.
  SAP Support: If the issue persists and you cannot find a solution, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.