Hi Thomas!
Glad to be at help!!!
As a matter of fact... you can't know. I also was puzzled when had this
problem. Another user on the list gave me this suggestion.
Request to Richard Sims:
Hi Richard! 
Would you like to add this solution to your VERY useful FAQ page under the
header "Trace/BPT trap(coredump)"?
Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines