How To Fix FDT_EXPRESSIONS812 - No valid class: class &1 doesn't exist

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 812

• Message text: No valid class: class &1 doesn't exist

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_EXPRESSIONS812 - No valid class: class &1 doesn't exist ?

  The SAP error message FDT_EXPRESSIONS812 indicates that there is an issue with a class that is expected to be present in the system but is not found. This error typically occurs in the context of SAP's Flexible Data Import (FDI) or when working with expressions in the context of data transformation or data mapping.
  
  Cause:
  
  
  Missing Class: The specified class (denoted by &1 in the error message) does not exist in the system. This could be due to:
  
  The class was never created or imported.
  The class was deleted or is not active.
  There is a typo in the class name or it is incorrectly referenced in the configuration.
  
  
  
  Transport Issues: If the class was recently transported from another system, the transport may not have included the class or it may not have been imported correctly.
  
  
  Namespace Issues: The class might exist in a different namespace that is not accessible in the current context.
  
  
  
  Solution:
  
  
  Check Class Existence:
  
  Use transaction