How To Fix J2777 - &4 Start position of substring is greater than end position

SAP Error Message - Details

• Message type: E = Error

• Message class: J2 - Message Class for Development Class JBT

• Message number: 777

• Message text: &4 Start position of substring is greater than end position

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message J2777 - &4 Start position of substring is greater than end position ?

  The SAP error message J2777, which states "Start position of substring is greater than end position," typically occurs in ABAP programs when a substring operation is attempted with invalid parameters. This error indicates that the starting position for the substring extraction is greater than the ending position, which is not allowed.
  Cause:
  
  Invalid Parameters: The parameters provided for the substring function are incorrect. For example, if you are trying to extract a substring from a string, the starting index is greater than the ending index.
  Dynamic Calculations: If the start and end positions are calculated dynamically, there may be a logic error in the calculations leading to an invalid range.
  Empty Strings: If the string being processed is empty or shorter than expected, it can lead to this error when trying to extract a substring.
  
  Solution:
  
  
  Check Parameters: Review the parameters being passed to the substring function. Ensure that the start position is less than or equal to the end position.
  DATA: lv_string TYPE string,
        lv_substring TYPE string.
  
  lv_string = 'Example String'.
  " Ensure that start_pos and end_pos are valid
  DATA(lv_start_pos) = 1.
  DATA(lv_end_pos) = 5.
  
  IF lv_start_pos <= lv_end_pos AND lv_end_pos <= strlen( lv_string ).
      lv_substring = lv_string+lv_start_pos(lv_end_pos - lv_start_pos + 1).
  ELSE.
      " Handle the error case
      WRITE: 'Invalid substring parameters'.
  ENDIF.
  
  
  Debugging: Use debugging tools to step through the code and inspect the values of the start and end positions before the substring operation is executed.
  
  
  Validation: Implement validation checks before performing substring operations to ensure that the indices are within valid ranges.
  
  
  Error Handling: Add error handling to manage cases where the substring parameters are invalid, providing meaningful messages or fallback logic.
  
  
  Related Information:
  
  ABAP Substring Syntax: The syntax for substring extraction in ABAP is string+start(length), where start is the starting index (0-based) and length is the number of characters to extract.
  String Length: Use the strlen() function to determine the length of the string before performing substring operations.
  Documentation: Refer to the SAP Help Portal or ABAP documentation for more details on string manipulation functions and error handling best practices.
  
  By following these guidelines, you should be able to resolve the J2777 error and prevent it from occurring in the future.