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How To Fix W8174 - Constants are restricted to only 80 characters


SAP Error Message - Details

  • Message type: E = Error

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

  • Message number: 174

  • Message text: Constants are restricted to only 80 characters

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Smart SAP Assistant

  • What is the cause and solution for SAP error message W8174 - Constants are restricted to only 80 characters ?

    SAP Error Message:
    W8174 - Constants are restricted to only 80 characters


    Cause:

    This warning occurs when you try to define a constant in ABAP whose value exceeds the maximum allowed length of 80 characters. In ABAP, constants are defined with a fixed value, and the system restricts the length of this value to 80 characters.

    For example, if you write:

    CONSTANTS c_long_constant TYPE string VALUE 'A very long string that exceeds 80 characters...'.

    and the string literal exceeds 80 characters, the system will issue this warning.


    Explanation:

    • The ABAP language restricts constant values to a maximum length of 80 characters.
    • This is a language design limitation to ensure constants remain manageable and efficient.
    • The restriction applies to the literal value assigned to the constant, not the data type length itself.

    Solution:

    1. Shorten the constant value:
      Reduce the length of the constant value to 80 characters or less.

    2. Use variables instead of constants:
      If you need to store a string longer than 80 characters, consider using a variable instead of a constant.

    3. Split the constant into multiple parts:
      If the long string is necessary, split it into multiple constants each with less than 80 characters, and concatenate them at runtime.

      Example:

      CONSTANTS c_part1 TYPE string VALUE 'First part of the long string...'.
      CONSTANTS c_part2 TYPE string VALUE 'Second part of the long string...'.
      
      DATA long_string TYPE string.
      long_string = c_part1 && c_part2.
    4. Use text symbols or external text files:
      For very long texts, consider storing the text in text symbols or external files and read them at runtime.


    Related Information:

    • ABAP Data Types: The string type can hold very long strings, but constants are limited in their literal length.
    • Constants in ABAP: Constants are compile-time fixed values and have restrictions on their definition.
    • SAP Notes and Documentation: Check SAP Help Portal or SAP Notes for any updates or changes in ABAP language restrictions.
    • Performance Consideration: Using very long constants is generally discouraged; variables or external storage are preferred for large texts.

    Summary:

    • Cause: Constant value exceeds 80 characters.
    • Solution: Shorten the constant, split it, or use variables/text symbols.
    • Note: This is a language limitation in ABAP constants.

    If you provide the exact code snippet causing the warning, I can help you refactor it accordingly.

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