How To Fix FM_SUBSET_E009 - First select a substring

SAP Error Message - Details

• Message type: E = Error

• Message class: FM_SUBSET_E - Message class for Master Data substrings' groups

• Message number: 009

• Message text: First select a substring

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FM_SUBSET_E009 - First select a substring ?

  The SAP error message FM_SUBSET_E009 with the description "First select a substring" typically occurs in the context of using function modules or when working with string operations in ABAP (Advanced Business Application Programming). This error indicates that a substring operation is being attempted without first specifying or selecting a valid substring.
  Cause:
  The error is usually caused by one of the following reasons:
  
  Invalid Substring Selection: The program is trying to access a substring of a string without defining the starting position and length of the substring.
  Empty or Null Input: The input string may be empty or null, leading to an invalid operation when trying to extract a substring.
  Incorrect Logic: There may be a logical error in the code where the substring selection is not properly handled before the operation is executed.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Substring Logic: Ensure that the code correctly specifies the starting position and length for the substring operation. For example, if you are using the SUBSTRING function, make sure you provide valid parameters.
  DATA: lv_string TYPE string,
        lv_substring TYPE string.
  
  lv_string = 'Hello World'.
  lv_substring = lv_string+6(5). " This will extract 'World'
  
  
  Validate Input: Before performing substring operations, validate that the input string is not empty and that the specified indices for the substring are within the bounds of the string length.
  IF lv_string IS NOT INITIAL AND strlen( lv_string ) >= start_position + length.
      lv_substring = lv_string+start_position(length).
  ELSE.
      " Handle the error case
  ENDIF.
  
  
  Debugging: Use debugging tools in SAP to step through the code and identify where the substring selection is being made. Check the values of the variables involved in the substring operation.
  
  
  Error Handling: Implement error handling to manage cases where the substring cannot be selected due to invalid parameters.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for string operations and function modules to understand the correct usage of substring functions.
  SAP Community: Engage with the SAP community forums for insights and solutions from other developers who may have encountered similar issues.
  SAP Notes: Check for any relevant SAP Notes that may address specific bugs or issues related to the error message.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to prevent it from occurring in your ABAP programs.