Do you have a timer in your app?
Yes, there's a timer running at the global level to monitor user activity and shut down the application if it remains idle for a long period of time. The timer code does not interact with the object directly, though it will trigger a routine that closes the window that contains the object if a shutdown proces is started. But the error did not occur within such a shutdown process.
There's no DOEVENTS in the loop I described, so I would expect that the FOR .. ENDFOR loop would complete a full iteration before being interrupted by anything ultimately triggered by the timer.
I do know that VFP sometimes only appears to "become aware" of states that have changed during a loop when execution gets to the "bottom" of the loop.
I don't think there's any code within the loop that could remove rows from the array--I'm aware that's a big no-no, but I will double check it tomorrow at work.
Or a bindevent() that may have stopped execution between those lines of code?
No, no bindevents(). Thanks. Ken
On March 1, 2017 4:33:22 PM EST, Ken Dibble <[email protected]> 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 > > -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
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