Number array to string AOI

Hey guys. I'm hoping you can help me out. I've created an AOI that will convert an array of type SINT, INT, or DINT to a string. I have a large array of INTs that contains numerous strings, so I have to use a start element and length input for AOI to know where to grab string characters in main array. Problem is that it works fine sometimes and other times, it spits out a random string that I'm not sure how it created.

There is 14 strings I need to convert in the same rung, so I have 14 of these AOIs being called at the same time. I'm not sure if that is what is causing the issue, but if it is, I need to find a way to grab all these strings simultaneously. This is an array of recipe data for a veneer mill, so when a recipe is changed, this array is updated and I need to update my PLC recipe with the new string values from this array.

This is an L81E controller running V30. I have attached a copy of the AOI and the rung of logic from my program I am using so you can hopefully see what the issue is.

Any help is appreciated!

Oh, also... if any of you know how to set up a single parameter to accept multiple data types, like SINT/INT/DINT, that would be awesome too! Basically like how most of the pre-defined instructions can accept those different datatypes. That's why I have to use dummy SINT and DINT tags when converting an INT array. I am trying to make it as universal as possible.

Thanks in advance!