I already said your script doesn't cause this error so your further modifications will not fix it. If I wanted you to avoid using the health variable, I would say so. What I said where I was talking about possible improvements to your script is that you should avoid writing to this variable when unnecessary because it involves additional actions, which in turn decrease efficiency, i.e. script execution speed. Most importantly, I never said avoiding its use would get rid of the error you experience, as that would be untrue. Now focus on what I wrote and notice I requested the value of the ESI register at the point of crashing that you can obtain from the error message. This is currently the only information from your side I'm interested in.