MAC OSX - 10.2.3 - Unexpected Quit

[Feasey, Nicholas]

Many thanks to all who assisted me with this problem.

Changing the 'Look and Feel' to 'MacOS Emulated' did the trick for me.
The behaviour has stopped since doing this.

Curious that Valetia is not experiencing the same issue so, when I have
time, I will explore further.
I will also try her further suggestion of creating a new sub-stack to see if
it is just related to
the particular sub-stack I am currently working with.

Once again, many thanks.

N