Sorry Paul I missed your latest reply.
I don't understand your statement:
"That only makes it all the more likely that the problem documents are corrupt."
I have 100's of docs, all of which I can open and edit without any problem.
I also had no printing same docs in Word 2003.
Yet when I print them in Word 2010, I get consistant print error message.
Charles thought it was an Add-In problem, but I ran "winword.exe /a" & still the error.
That suggests the docs are fine, Word 2003 is fine (at least printing), but there is some bug in Word 2010, else all the docs which open/edit ok would print??

Anyway if all my docs are "corrupt", is there some way to mass-correct them?