How To Fix W8106 - Constants cannot begin with '%' or '&'

SAP Error Message - Details

• Message type: E = Error

• Message class: W8 - Workflow: Expressions, data flow

• Message number: 106

• Message text: Constants cannot begin with '%' or '&'

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• What is the cause and solution for SAP error message W8106 - Constants cannot begin with '%' or '&' ?

  Certainly! Here's a detailed explanation for the SAP error message W8106: Constants cannot begin with '%' or '&':
  
  Error Message
  W8106: Constants cannot begin with '%' or '&'
  
  Cause
  This warning occurs when you define a constant in ABAP code that starts with the characters % or &. In ABAP, constants are not allowed to begin with these special characters because:
  
  % and & are reserved for system variables or special syntax elements.
  Using these characters at the start of a constant name or value can cause ambiguity or conflicts in the ABAP parser.
  
  For example, the following is not allowed:
  CONSTANTS c_example TYPE c VALUE '%test'.
  CONSTANTS c_example2 TYPE c VALUE '&test'.
  
  Solution
  
  
  Do not start constant values with % or &.
  
  Change the constant value so that it does not begin with these characters.
  
  
  If you need to use % or & as part of the constant value, place them after the first character, for example:
  
  
  CONSTANTS c_example TYPE c VALUE 'A%test'.
  CONSTANTS c_example2 TYPE c VALUE 'B&test'.
  
  If the constant is a string and you need to include % or & at the beginning for some reason (e.g., a special code or pattern), consider:
  
  Using a different naming or value convention.
  Escaping or encoding the value if applicable (though ABAP constants do not support escape sequences in this context).
  
  
  
  
  Related Information
  
  ABAP Syntax Rules: Constants must follow naming and value conventions to avoid conflicts with reserved characters.
  Special Characters in ABAP: % and & are often used in system variables (e.g., %_ variables) or macro expansions.
  SAP Notes and Documentation: Check SAP Help or SAP Notes for any updates or exceptions related to constants and special characters.
  Debugging: If you encounter this warning during code activation, review the constant declarations and adjust accordingly.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  Constants cannot begin with % or &.
  
  
  Cause
  Constant value starts with % or &.
  
  
  Solution
  Change constant value to not start with % or &.
  
  
  Notes
  % and & are reserved characters in ABAP.
  
  
  
  
  If you provide the exact code snippet causing the warning, I can help you correct it specifically.