How To Fix WL137 - Constants cannot be declared here

SAP Error Message - Details

• Message type: E = Error

• Message class: WL - Workflow: run-time messages

• Message number: 137

• Message text: Constants cannot be declared here

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WL137 - Constants cannot be declared here ?

  The SAP error message WL137, which states "Constants cannot be declared here," typically occurs in ABAP (Advanced Business Application Programming) when you attempt to declare a constant in an inappropriate context. Constants in ABAP can only be declared in specific places, such as in the declaration section of a program, function module, or class.
  Cause:
  The error is usually caused by one of the following scenarios:
  
  Incorrect Declaration Location: You are trying to declare a constant in a place where it is not allowed, such as inside a method or a function where only variables can be declared.
  Syntax Issues: There might be a syntax error in the way the constant is being declared.
  Scope Issues: The constant is being declared in a scope that does not support constant declarations.
  
  Solution:
  To resolve the WL137 error, you can follow these steps:
  
  
  Check Declaration Location: Ensure that you are declaring the constant in the correct section of your code. Constants should be declared in the following places:
  
  In the declaration section of a program or report.
  In the declaration section of a class or interface.
  In the declaration section of a function module.
  
  Example of a correct declaration:
  CONSTANTS: c_my_constant TYPE i VALUE 10.
  
  
  Move the Declaration: If you have mistakenly placed the constant declaration inside a method or function, move it to the appropriate declaration section.
  
  
  Check Syntax: Ensure that the syntax of your constant declaration is correct. The general syntax for declaring a constant is:
  CONSTANTS: <name> TYPE <data_type> VALUE <value>.
  
  
  Review Scope: If you are working within a class or method, ensure that you are not trying to declare a constant in a local scope where it is not permitted.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for more details on constant declarations and the rules governing them.
  ABAP Development Guidelines: Familiarize yourself with best practices for ABAP programming, which can help avoid such errors in the future.
  Debugging Tools: Use the ABAP debugger to step through your code and identify where the error is occurring.
  
  By following these guidelines, you should be able to resolve the WL137 error and successfully declare constants in your ABAP programs.