I eager to get some help and am resubmitting this from yesterday... I have a
macro with about 20 userforms. As far as I can tell, it worked great in
earlier versions of Excel. I am now using the macro on a new machine with
Excel 2007. After I call the exact same sub-routine a bunch of times, I get:

Run-time error '75': Could not find specified object.

The debugger highlights "Load UserForm13". I can see it is right there in
VB interface and it had just accessed it 3-20 times prior to failing. I
can't open it though. There is a lot of other code, so I haven't bothered to
provide this.

Any help or guidance would greatly be appreciated. Thank you
in advance.