Why does a change in the time span change the value of the results of this ODEs?

[cbentivoglio]

Hello everyone,
How is it possible that by changing the time of my ODE system, also the result change?
I will link the program so that you can see what I am trying to say. 

P.S. I use Mathcad Prime 3.1

[MJG]

FYI - to attach a file you may need to zip it first (right-click, send to, compressed folder).

[cbentivoglio]

Thanks, I was trying to find a way to convert .mcdx into .zip

[VladimirN]

You can use 7-zip software: http://www.7-zip.org

[cbentivoglio]

Thanks, but I already found another converter!

[ValeryOchkov]

Sorry, but 10 000 s > 1hr