Referencing a Word document that is already open

See how easy it is once you've provided the correct problem description...

Getting it for this one's been like pulling teeth!

Not exactly sure but it is only working for me about 50% of the time. When it doesn't work I get the read only warning. Any idea what the problem might be?

The only reason I can see that you'd get a 'read only' warning is if you had the document open in Word before running the macro the first time.