Hi 

I have Windows7 Is that a problem ?

Could the .maple file be placed manually somewhere to avoid these problems?

Thank you very much. How can formula be adjusted to calculate the end voltage V2 when C is charged between t1 and t2 with Capacitor  start voltage V2start ? Would it just be V2(t2) - V2(t1) ?   I am not sure how the V2start interacts here.