How To Fix CDS_UNIT_MESSAGE034 - Session variable '&1' is not valid

SAP Error Message - Details

• Message type: E = Error

• Message class: CDS_UNIT_MESSAGE - Message Class

• Message number: 034

• Message text: Session variable '&1' is not valid

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CDS_UNIT_MESSAGE034 - Session variable '&1' is not valid ?

  The SAP error message CDS_UNIT_MESSAGE034 indicates that there is an issue with a session variable in a Core Data Services (CDS) view or query. Specifically, the message states that the session variable &1 is not valid. This typically occurs when the session variable is not defined, has an incorrect name, or is not accessible in the context where it is being used.
  Causes:
  
  Undefined Session Variable: The session variable you are trying to use has not been defined in the CDS view or the context of the query.
  Typographical Error: There may be a typo in the name of the session variable, leading to it being unrecognized.
  Scope Issues: The session variable may not be available in the current context or scope where it is being referenced.
  Incorrect Usage: The session variable might be used in a way that is not supported, such as in a context where it cannot be evaluated.
  
  Solutions:
  
  Check Definition: Ensure that the session variable is properly defined in the CDS view or the relevant context. Verify that it is declared correctly.
  Verify Name: Double-check the spelling and case of the session variable name. SAP is case-sensitive, so ensure that the name matches exactly.
  Context Review: Review the context in which the session variable is being used. Make sure that it is accessible and valid in that context.
  Documentation Review: Consult the SAP documentation for session variables to ensure you are using them correctly and in the right context.
  Debugging: If possible, use debugging tools to trace the execution and see where the session variable is failing to be recognized.
  
  Related Information:
  
  Session Variables in CDS: Session variables are used in CDS views to capture user-specific data or context. They can be defined using the @Session annotation.
  SAP Notes and Community: Check SAP Notes or the SAP Community for any known issues or updates related to this error message.
  SAP Version: Ensure that you are using a compatible version of SAP that supports the features you are trying to implement with session variables.
  
  If the issue persists after checking these aspects, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.