[AccessD] Error 3075 in app running on a Mac with Parallels

Dear List:
 
I have a user of my commercial app, distributed as mde compiled in 2003.
Runs fine under windows.  
 
This client is running on a Mac using parallels, and gets an error 3075 -
Function is not available in expressions in query expression 
 
'left(OrderNumber,7) = '2013501'
 
where '2013501' is an order number and its a filter that's being created.  
 
He's running Access 2010. 
 
Looks like a broken reference but, of course, it runs fine here on my 2010
test bed.
 
Any ideas?
 
MTIA
 
Rocky Smolin
Beach Access Software
858-259-4334
www.bchacc.com <http://www.bchacc.com/> 
www.e-z-mrp.com <http://www.e-z-mrp.com/> 
Skype: rocky.smolin