Mark,
What about toggling Application.EnableEvents=False/true ?

NickHK

"Mark VII" wrote in message
...
Have you tried setting Application.Calculation to manual, making the
changes and then setting it back to automatic?

Interestingly, I tried to do exactly that. Unfortunately, the Worksheet
Change event in the second workbook contains logic where I'm turning
calculation off, then on again as part of some special handling of user
updates. Consequently, calcuation starts out turned off by the utility
program, but the second workbook's Worksheet Change logic turns it back on
at
the end of the sub.

Mark