excel program giving up halfway through calculation

I wrote a program in excel. It solves a network of equations and graphs the solutions. It models ionic fluxes across a biological membrane.

The math works. What I have calculated and what I am able to graph match what has been previously published. However, Excel quits about halfway through the calculation. The program is too big to attach, but at a particular cell, it calculates a value based on referenced cells. The referenced cells are all numbers, not dead cells, but this particular cell is dead-- and then the entire calculation dies. It is a NUM error, not a DIV/0 error.

Maybe the program just has too many significant figures to juggle and it quits...? I don't know, and nobody around me at work knows how to fix this either.

I'm not a pro Excel user, and maybe this problem is easily solved. If it is, please suggest some things I might try. I'd like to expand my program to add more complexity.

if you are interested in having a look at the program, IM or email me, and I'll email it to you. It's around 1.3 mb

Thanks!

Hello Nikolai,

You don't have your email address in your profile. You can send me a copy. My email is [email protected]

Sincerely,
Leith Ross

Thanks for the help Leith. It's not Excels fault, it's mine. Another bug that needs stomping.

Nikolai