[maxmsp] Re: waveform~ display crashing every time

Most likely some kind of feedback loop problem.  I've no clear answer, but the basic process of your patch is
-
Bang
(Cat end) sent to (Dog start)
(Dog start) sent to (Cat end)
-
Max is trying to set an end value for cat with itself, over and over again.  I don't think you can do it this way, whatever it is you want, and I don't believe it's anything to do with message order.

If I'm way off I blame lack of sleep, please don't tell my lecturers.