How To Fix RS2HANA_VIEW121 - External SAP HANA view: Variable '&1' must be of type "Single Value"

SAP Error Message - Details

• Message type: E = Error

• Message class: RS2HANA_VIEW - HANA Views for BW Objects

• Message number: 121

• Message text: External SAP HANA view: Variable '&1' must be of type "Single Value"

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RS2HANA_VIEW121 - External SAP HANA view: Variable '&1' must be of type "Single Value" ?

  The SAP error message RS2HANA_VIEW121 indicates that there is an issue with a variable in an external SAP HANA view. Specifically, the error states that the variable &1 must be of type "Single Value." This typically occurs when a variable is expected to return a single value but is instead returning multiple values or is not properly defined.
  Cause
  The error can arise from several scenarios:
  
  Variable Definition: The variable in the HANA view is defined in such a way that it allows multiple values, but the context in which it is being used requires a single value.
  Input Parameters: If the variable is being used as an input parameter in a query or report, it may not be correctly set up to accept only a single value.
  Data Model Issues: The underlying data model may not be structured correctly, leading to multiple values being returned when only one is expected.
  
  Solution
  To resolve this error, you can take the following steps:
  
  
  Check Variable Definition:
  
  Go to the HANA view definition and check how the variable &1 is defined. Ensure that it is set to accept only a single value.
  If it is defined as a range or a multi-value variable, change it to a single value variable.
  
  
  
  Review Query/Report Logic:
  
  If the variable is being used in a query or report, ensure that the logic is designed to handle a single value. This may involve modifying the query to filter results appropriately.
  
  
  
  Test the Variable:
  
  Test the variable in isolation to see what values it returns. If it returns multiple values, you may need to adjust the logic or filters applied to the variable.
  
  
  
  Check Data Model:
  
  Review the underlying data model to ensure that it is structured correctly. If necessary, adjust the joins or filters in the data model to ensure that the variable can only return a single value.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or community forums for additional guidance on handling variables in HANA views.
  
  
  
  Related Information
  
  SAP HANA Documentation: Review the official SAP HANA documentation for best practices on variable definitions and usage.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  Debugging Tools: Utilize debugging tools available in SAP HANA Studio or SAP Web IDE to trace the execution of the view and identify where the issue arises.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.