On Jan 23, 10:33*am, "Al G" wrote:

* * if it was a software issue, it would be interesting to find out why it
had not manifested itself in 6 years and 20,000+ hours.

Al *G

That is usually how it works with software bugs. The ones that are
easy to generate get caught in testing. It's the bugs that require
some really unusual and unlikely combination of inputs that tend to
get through into production code.

Phil