Help with solve()

[roadrunner]

Yes, A-Z and θ are built in global variables. They can only hold real numbers. There are also built in graphic, list, matrix, and complex variables.

I don't know if you can pass local variables to HOME; never tried it. You can pass local variables to CAS, but it's tricky. If you have to use local variables with the solve() command in a non CAS program I suggest you study up on the CAS() command. Start with cyrille de brébisson's document in post #9 here:

http://www.hpmuseum.org/forum/thread-6218.html

-road