I'll help you with the math. The reason you get an error is because it is zero percentage. And my calculator give an answer of 0, not error. Maybe you should get a new calculator.
I will also give you the percentages for Texas CHL convictions in 2011 for the following, which is part of what you asked for in your original post, and were readily available to you from the DPS website.
Deadly Conduct Discharge of firearm - 0.00000385635%
Unlicensed Carry - 0.00002892263%
Unlicensed carry of weapon - 0.0000308508%
Aggrivated assault w/deadly weapon - 0.00000578452%
Texas doesn't list the criminal trespass numbers, so I can't give you them. Now the numbers are there for this side of the argument on your question. Please post the numbers for your side of the argument for rates of states which don't require mandatory training. Once you gather that information, we can either have a discussion or put all this nonsense to rest because the numbers should speak for themselves.
Also, if you look over the entire list of convictions that Texas lists, your calculator would give you a whole bunch of "errors". Not because it can't be computed, but simply because they didn't happen, so there was 0% of it occuring.