How To Fix GS309 - Select one variable type only

SAP Error Message - Details

• Message type: E = Error

• Message class: GS - Sets

• Message number: 309

• Message text: Select one variable type only

What causes this issue?

When creating a variable without a variable to be copied, you checked
off several variable types. However, the variable can only have one
type.

System Response

The system does not create the variable.

How to fix this error?

Check off one variable type only.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GS309 - Select one variable type only ?

  The SAP error message GS309 ("Select one variable type only") typically occurs in the context of SAP reporting or query design, particularly when using tools like SAP Query or SAP BW (Business Warehouse). This error indicates that the user has attempted to select multiple variable types in a scenario where only one type is allowed.
  Cause:
  The error is triggered when:
  
  The user tries to select more than one variable type (e.g., both a selection variable and a text variable) in a single query or report.
  The configuration of the query or report does not support multiple variable types for the same parameter.
  
  Solution:
  To resolve the GS309 error, follow these steps:
  
  
  Review Variable Selection: Go back to the variable selection screen and ensure that you are only selecting one type of variable. For example, if you are using a selection variable, do not include a text variable in the same selection.
  
  
  Check Query Design: If you are using a query designer, check the properties of the variables you have defined. Make sure that each variable is set up correctly and that you are not mixing variable types.
  
  
  Modify the Query: If necessary, modify the query to separate the variables into different queries or reports, ensuring that each one adheres to the single variable type requirement.
  
  
  Consult Documentation: If you are unsure about the variable types and their configurations, refer to the SAP documentation or help resources specific to the version of SAP you are using.
  
  
  Testing: After making the necessary adjustments, test the query or report again to ensure that the error has been resolved.
  
  
  Related Information:
  
  Variable Types: In SAP, common variable types include selection variables, text variables, and hierarchy variables. Understanding the differences and appropriate use cases for each can help prevent this error.
  SAP Query and BW: Familiarize yourself with the specific tools and their limitations regarding variable types. Each tool may have different rules for how variables can be used.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message, as there may be updates or fixes available.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.