How To Fix GS317 - Do not change the variable type

SAP Error Message - Details

• Message type: E = Error

• Message class: GS - Sets

• Message number: 317

• Message text: Do not change the variable type

What causes this issue?

When you changed a variable, its variable type was changed. This is
not allowed, since it can lead to errors if the variable is already
used.

System Response

The system does not change the variable.

How to fix this error?

Please do not change the variable type or delete the variable first and
then create it again. You can only delete the variable if it is not
used.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GS317 - Do not change the variable type ?

  The SAP error message GS317 ("Do not change the variable type") typically occurs in the context of ABAP programming when there is an attempt to change the data type of a variable that has already been defined. This can happen in various scenarios, such as when modifying a program, function module, or method where the variable's type is expected to remain consistent throughout its usage.
  Cause:
  
  Type Mismatch: The variable was initially declared with a specific data type, and later in the code, there is an attempt to assign a value of a different type to it.
  Inconsistent Declarations: If the variable is declared in multiple places (e.g., in different includes or methods) with different types, it can lead to this error.
  Modification of Data Elements: If a data element or domain that a variable is based on is changed in the Data Dictionary, it can lead to inconsistencies in the program.
  
  Solution:
  
  Check Variable Declarations: Review the variable declarations in your code to ensure that the data type is consistent throughout. Make sure that the variable is not being re-declared with a different type.
  Use Consistent Data Types: Ensure that any assignments to the variable are of the same type as the variable's declaration. If necessary, convert the data to the appropriate type before assignment.
  Review Includes and Methods: If the variable is used across multiple includes or methods, ensure that it is declared consistently in all places.
  Data Dictionary Changes: If the error is related to changes in the Data Dictionary, check if any data elements or domains have been modified. If so, you may need to adjust your program accordingly.
  Recompile the Program: After making changes, recompile the program to ensure that all changes are recognized by the SAP system.
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for guidelines on variable declarations and data types.
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to this error message.
  Debugging: Use the ABAP debugger to trace the execution of the program and identify where the type mismatch occurs.
  
  By following these steps, you should be able to resolve the GS317 error and ensure that your ABAP code adheres to the required data type consistency.