I have a couple of patches which sometimes vvvv refuses to load and I have to go back to an earlier version.
It appears that the problem is in a stored UDP string (e.g. OSC from timeliner)
So the UDP string is stored in the .v4p file, but when vvvv tries to open it it throws a “FATAL ERROR” and doesn’t continue.
In the udp string there are characters which notepad++ reports as “NULL” and lots of non-ASCII symbols