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Originally Posted by Sreyas can u show the upper region of this function and also the below region im pretty sure that you declared it in another function body.It should be declared globally out side of everything...

It's simpler than this. He created this function at the end of the script, but I doubt he has any forward declaration. Hence, anything that comes before the function is not aware the function exists.

@OP: Lookup forward declarations. If you do that correctly, it will work.