<snip > Of course, the way to handle this is to add code to test the size of the array before trying to iterate it, which I have now done. But I am still at a loss to understand how the error could occur.
What I usually do in situations like this is to put in lines of code to write out to log files. You usually spot something unusual then and can refine it or fix it. Something like
if file('alerts.txt') strtofile('My messages','mylogfile.log',.t.) endif
You can then turn off the logging by removing the alerts.txt.
Yup, I've done this before too. I was hoping suggestions from folks would narrow down the range of stuff I'd need to log.
Thanks.
Ken