The following steps can be useful for running h5mma inside a debugger

1. Run h5mma executable from the command line (inside a debugger if you like)
2. Choose a random number, n, for the link
3. Change Install["h5mma"] -> Install[LinkConnect["n"]] in h5mma.m
4. Load h5mma as normal, but now you have a debuggable executable with standard output