Calling Unmanaged DLL From C#

Question

Hi all, I've inherited a code-base which uses existing DLLs that contain all of our statistical algorithms. In the .NET development environment, the DLLs execute fine and return as expected. Moreover, when I compile the .NET project to an .exe, I am able to run it locally on the same machine that the development was done on. However, when I attempt to port the executable (along with the DLLs, which I store in the same directory as the .exe) to other machines, the program crashes, with no error message, when the DLL is called (I verified this by removing the DLL call and compiling, and the program ran with no problem). In our Wrapper class (CoreAlgorithms.cs), I have the following code:

[DllImport(@"dcdflib.dll", EntryPoint = "cdft", ExactSpelling = false, CallingConvention = CallingConvention.Cdecl)] public static extern unsafe void cdft(int* which, double* p, double* q, double* mult, double* df, int* status, double* bound);

I then call this method as follows:

unsafe
{
CoreAlgorithms.cdft(&which, &p, &q, &mult, &df, &status, &bound);
}


Again, this works fine in .NET and my machine, but fails immediately on other machines. Does anyone have any idea as to I'm doing incorrectly here? Any help or pointers would be greatly appreciated. Thank you for your time.