Any advice on how to debug this?

[Eric Pouech]

> The stack traces in both cases are similar and indicate to me that the
> processes have ended up executing data.
> However by the time I get to disassemble the code referred to by the
> backtrace the code isn't there any longer.
is most of the cases, it means that the program is no longer running (it
may 
have been killed by the other program)

> What's my best bet for tracking this down?
as the processes seem to be furtive, using relay traces (and friends)
may be
a better bet to locate the issue, and then perhaps set the bp where
needed

A+