[j_cool]

I can spot one error, model's name is case sensitive.
Here is what I get with model being offline:

C:\>mfcdump Mellifluous_
the model has no public streams

C:\>mfcdump
Enter model name: Mellifluous_
the model has no public streams
Press enter to continue...

I get the same thing that you got when I type just anything on the prompt:

C:\>mfcdump /?
Error: got service information
*errors.errorString got service information
/usr/local/go/src/runtime/panic.go:505 (0x42c7e7)
/home/rus/go/src/gomfc/recorder/mfcdump.go:58 (0x7e5165)
/usr/local/go/src/runtime/proc.go:198 (0x42e6de)
/usr/local/go/src/runtime/asm_amd64.s:2361 (0x4576e1)