Do you have a timer in your app? Or a bindevent() that may have stopped execution between those lines of code?
On March 1, 2017 4:33:22 PM EST, Ken Dibble krdibble@stny.rr.com wrote:
Never seen something like this, but if you are distributing an exe,
then
you should md5 it so you can detect any change comparing with a saved
md5.
This way I've found viruses that changed parts of the code and
antiviruses
have cleaned them up, but leaving the exes in a different state than
the
original, sometimes even unrunnable.
That's a really good idea.
As it turns out, I'm embarrassed to say, the line of code reported in the trace does exist, in a virtually identical list control subclass on the same form (one overlays the other exactly). I wasn't paying attention to the name of the control in which the error occurred.
There are actually 10 columns in the array in this method.
So what actually happened is that somehow, between:
FOR m.x = 1 TO ALEN(THISFORM.oMail.aSortList,1)
and
thekey = THISFORM.oMail.aSortList(m.x,10)
somehow the length of the array got truncated.
Now, there is NO other code between those two lines, so ALEN(THISFORM.oMail.aSortList,1) would have had to return an impossible result for the next line to fail.
I have seen this on a few occasions when iterating arrays, but I remain mystified as to how it could happen.
Ken