I am making a project in Microsoft Excel using a Macro. I call external
program(lp_solve) functions in my code. I am getting several errors when I
run my program. The first is "Microsoft Excel has encountered some problems
and needs to shut down." The second says something about available
resources. And finally the third is a Microsoft Visual Basic Compile Error:
Out of memory.

Does anyone know how I can check memory usage, gain memory back, or why I am
getting these messages?

Thanks for your help.