Hello, I'm having a problem with a Mathcad file - I am able to get the mathcad file to work if I separate it into two different files. However, in the same file it gives me an error about a variable being undefined. I'm not sure what's up with this. It's a first order absorption and elimination problem.
I've attached the files to show what the second part of the program is suppose to do and what it does if it works. I tried changing the variable names and references but something strange that I can't figure out is happening. I would appreciate any advice or wisdom on the matter.