This seems like something dumb and perhaps simple is happening.

So I type "=" in cell on destination file. Click over to source file and click on cell I want to link. Nothing happens. Used to be, a dotted boundary would appear and the value would populate in the destination cell. What happened? This just started happening today. Is there some setting that got messed up?

Thanks in advance for any insight.

Perhaps should mention this is Office2000

Never mind. Uninstalled a bunch of trial versions of other Excel releases that somehow found their way onto the machine, then reinstalled Office 2000 and it works again.