I need more specifics.  What exactly happens that prevents entering of multiple WO?

So is it kicking the user out to the menu? Then they have to go back into WO-A to add the next WO#?
 

what version of EVO are the two copies? go to the Help About menu.
 
is he using the T7 version of WO-A or the BK ? you can check his user login menu's using TAS-G and see if he's set up to use T7WOA.RWN or BKWOA.RUN.
 
you can also see the date of the specific menu when you go into WO-A to edit a WO, what is that date?
 
also, have him or you go and change company's into the test company ( manufacturing answer) and attempt the same procedure in creating new work orders.
 
that helps determine if it's data related or program related. the other information is helpful in knowing the date of your programs and what version is being ran.
 
i've tested WO-A using both the T7 and BK menus, using the past 2 update versions, and it works just fine.
 
hth,
dave