How To Fix CM404 - Access with invalid index (&)

SAP Error Message - Details

• Message type: E = Error

• Message class: CM - Task list messages: Material component allocations

• Message number: 404

• Message text: Access with invalid index (&)

INCLUDE NA_SYSAD2

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CM404 - Access with invalid index (&) ?

  The SAP error message CM404, which states "Access with invalid index (&)," typically occurs when there is an attempt to access an internal table or a data structure using an index that is either out of bounds or not valid. This can happen in various scenarios, such as when the index is negative, exceeds the number of entries in the table, or is not initialized properly.
  Causes:
  
  Out-of-Bounds Index: The index being used to access an internal table is greater than the number of entries in that table.
  Negative Index: The index is negative, which is not valid for accessing table entries.
  Uninitialized Index: The index variable has not been initialized before being used.
  Table Modification: The internal table may have been modified (entries added or deleted) after the index was set, leading to an invalid index.
  Looping Errors: Errors in loops that manipulate the index can lead to invalid access.
  
  Solutions:
  
  
  Check Index Value: Before accessing the internal table, ensure that the index is within the valid range (1 to the number of entries in the table).
  IF index > 0 AND index <= lines(internal_table).
      " Access the table
  ELSE.
      " Handle the error
  ENDIF.
  
  
  Initialize Index: Always initialize the index variable before using it to access the table.
  DATA: index TYPE i.
  index = 1. " Initialize to a valid value
  
  
  Debugging: Use the debugger to check the value of the index at runtime and ensure it is valid before the access occurs.
  
  
  Error Handling: Implement error handling to manage cases where the index might be invalid. This can include logging the error or providing a user-friendly message.
  
  
  Review Logic: Review the logic of your program, especially loops and conditions that manipulate the index, to ensure that they do not lead to invalid index values.
  
  
  Related Information:
  
  Internal Tables: In ABAP, internal tables are used to store data in a structured way. Accessing them with an invalid index can lead to runtime errors.
  ABAP Debugger: Utilize the ABAP debugger to step through the code and monitor the values of variables, including the index and the internal table.
  Documentation: Refer to SAP documentation for best practices on handling internal tables and managing indices.
  
  By following these guidelines, you should be able to identify the cause of the CM404 error and implement a solution to prevent it from occurring in your SAP applications.