XLL addin crashing Excel

[dhrosti]

Hi, I tried posting this in the beginner's forum but haven't got any response yet, hopefully someone here can help?

I have tracked the troublesome code to the lines printed below.

Basically, I have a function called "MinMW" and within this function I have this call:

double* vals = new double [37];

Station.Parameters(vals,Temp,.......); // Long list of arguments

double TotalPower = vals[0];

The "Parameters" function is this:

int Station::Parameters(double *vals, double Tamb, ........) {

// Lots of code, skip to important bit

vals[0] = 123.4;
// ...
vals[36] = 123.4;

return 1;

}

There are no errors from Visual Studio 2010 when building the XLL, but Excel crashes whenever "MinMW" is called.

Any ideas would be gratefully received.

[helios]

Have you tried debugging the program to see where it crashes?

[keithalewis]

This can happen when you step on out of bounds memory. Why not use std::vector<double> vals(37)?

If you are creating xll's, you should definitely check out http://nxll.codeplex.com . It makes the process much easier. The library does memory checking when compiled in debug mode.