Yeah, more than once I've coded suicide counters into indeterminate loops to catch corrupted graphs. And recently I had a fairly simple user-created graph that

Yeah, more than once I've coded suicide counters into indeterminate loops to catch corrupted graphs. And recently I had a fairly simple user-created graph that I forgot to put a suicide counter on. Of course I found out the omission the hard way. What did you expect it to do when you said A waits on B, B waits on C, C waits on D and D waits on A??? (Actually, the main part worked so it didn't immediately smack him in the face. However, there was a routine to find the completion time, if an item didn't exist use the completion time of it's parent(s).)