Debugar com ajuda do Dosemu

I have a bug in a program that makes dosemu close. I can get no information from memory debuggers.

In dosemu log I found this:
[...]
SIGILL while in vm86(): 2ea6:0017
DOS termination requested
leavedos(0|0x0) called - shutting down

How can I use dosemu to help? something like a debug option to get more details?

Thanks,
Alain