In the attachment, the code for lines 189-193 (see Firebug screen capture),
cannot be selected for breakpoint. When tracing a line at a time, the
procedure 'set_qRefMap' appears to return to its caller after line 188. It
never reaches line 190. When this code is run without Firebug, it runs
sucessfully, without exception and without failure.
The program that causes this is rather large and will take some time to
reduce to a minimal case -- if that can be achieved at all...
I have now reverted to using pop-up alerts to debug my application.
Can anyone please make a recommendation of which versions of
firebug/firefox I should revert to in order to get to a last known working