Vvvv freezing/crashing

Is there any way to diagnose freezing/crashing? Like a log dump or something?

for problems with getting vvvv to startup there is the
flag which writes out startup info.

for runtime problems there is the LogFile (VVVV) which basically dumps to disk what you also see in the Renderer (TTY).

for freezes/crashes during patching i am afraid both won’t be of any use. your best bet for those is to find cases which you can make us to reproduce here and which we’d then be able to fix.