You can bypass the Java interface when working with the C++ core. This is very useful when debugging.
To access the interface, build the project that contains the interface and then run "coremodel.exe" (probably from a debugger). The welcome screen should appear in a DOS window.
To add a file, type "input " + the filename. If the file reads correctly, the following appears:
Model Status: Ready to run.
To run, type "run". If you want to specify a number of timesteps to run, you can type the number after the word "run." To enter another file, type "input " followed by the path and name of the parameter file.
For a list of all commands, type "help". To end, type "quit".