V4005¶

Code: V4005
Message: Array index out of bounds

The program attempted to access an array element with an index that is outside the valid range. The index must be between the declared lower and upper bounds of the array.

Example¶

The following code will generate error V4005:

Try it

Source

PROGRAM Main
VAR
    values : ARRAY[1..5] OF INT;
    i : INT;
    result : INT;
END_VAR
i := 6;
result := values[i];  (* Error: index 6 is out of bounds for ARRAY[1..5] *)
END_PROGRAM

The array values has valid indices 1 through 5, but index 6 is outside that range. The index is worked out while the program runs, so the program compiles and stops when it reaches the access. A constant index outside the array is reported when the program is compiled, as P2027.

To fix this error, ensure the index is within the declared bounds of the array:

Try it

Source

PROGRAM Main
VAR
    values : ARRAY[1..5] OF INT;
    i : INT;
    result : INT;
END_VAR
i := 3;
IF i >= 1 AND i <= 5 THEN
    result := values[i];
END_IF;
END_PROGRAM

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