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Codes / Error Code 003

Error Code 003

Overview

This error occurs when a program attempts to access memory it is not allowed to. This can happen due to dereferencing null or invalid pointers or accessing memory outside the bounds of an array.

Details

  • Common Causes:

    • Dereferencing a null or uninitialized pointer.
    • Accessing an array index that is out of bounds.
    • Writing to read-only memory.

  • Example:

void main() {
    int* ptr = null;
    *ptr = 42; // Error: access violation
}
  • Solution:
    • Ensure pointers are initialized before use: 
      void main() {
    int value = 42;
    int* ptr = &value;
    *ptr = 43; // Safe
}
    • Use bounds checking for arrays: 
      void main() {
    int[] arr = [1, 2, 3];
    if (arr.length > 2) {
        writeln(arr[2]); // Safe
    }
}