Using the solve function in Prime 3.0 with units not working

[ptc-6803749]

Hej

I just downloaded Prime to try it out, and i like the layout and general feel a lot better than MathCad15, but I've run into a huge problem.

I used the symbolic solve in 15 a lot, solving for a missing variable in an equation, where all others were defined with units and then using the normal '=' in the evaluation tab. Then 15 would combine the units and spit out a useable result, where I could change the units by writing the desired unit on the end. The picture below shows what i mean:

Now trying to do the exact same thing in Prime 3.0 gives me the following

Any help would be appriciated!

[Fred_Kohlhepp]

You're trying for a symbolic solve; but the symbolic processor doesn't recognise units. Try a numeric solve block.

[ptc-6803749]

And how exactly do I use numeric?

Why is it 15 seems smarter than Prime?

[Fred_Kohlhepp]

15 is smarter than Prime. Prime 3 is the first that could actually be considered "useable," version 15 will still do many things that Prime will choke on.

That said, Prime is the path forward.

[Fred_Kohlhepp · Accepted solution]

Actually, your problem is that Prime doesn't recognize kJ as a unit. Define that and . . .

[ptc-6803749]

kJ was defined at the top of the page, but turns out it was because there was a * missing between ...c.pegl(t.gf-... when I made that ...c.pegl*(t.gf-... it worked.... Well that was an awesome way to waste half a day.. Thanks a lot for the help though