Plugin and commy can hang from time to time - not all tunes have been tested. There is many bugs in songs from HVSC, which make no effect on 6510 emulator, but crash on real hardware. Take a look at this work of some 'proffesional ripper' (initial routine from Praiser's Manual_Vision.sid):
LDA #$00
STA shit
JSR $1000
shit NOP
...