FrmCustomAlert causes crash

[Jeffrey Pahren]

I have a very straightforward call to FrmCustomAlert():

FrmCustomAlert(NameAlert, FullName, " ", " ");

This works properly for me 99.9% of the time.  I have one case, where 
FullName > 200 characters long, that causes a crash with the following
message in POSE:

"...just written directly to memory manageer data structures".

I see nothing in the docs or books that says there is a limit on the
length of the string being passed in.  Is there one?  If so, what is it?

-jeff