error with s+nuopt

["Ad Feelders" <ad@cs.uu.nl>]

Dear S-Plus users,

I'm using S-Plus 6.0 for Windows together with NuOpt version 1.4.
I'm calling the NuOpt solver from with a function that looks
something like this.

function(m)
{
                for(i in 1:m) {
                system <- System(somesystem)
                solution <- solve(system)}
}

When I call this function everything goes fine for a few iterations,
but then splus is closed down with the error message:
"bad call to eval_close()".

Is this a familiar error to other NuOpt users? Anybody got an idea
what might be causing it?

Thanks for your help.

-Ad Feelders