Learn About Array Index is Out of Range Errors
In AS400 programming, an “Array Index is Out of Range” error occurs when an array element is accessed using an index value that exceeds the defined array boundaries. This error typically arises in RPG (Report Program Generator) or CL (Control Language) code when looping through arrays or accessing array elements dynamically. To avoid this issue, developers should ensure that index values are properly validated and kept within the array’s defined range. Techniques such as using the %ELEM built-in function in RPG or implementing boundary checks in logic can help prevent runtime errors and maintain application stability.