Share 'Exceptions in OS/2'

I have finally got a copy of OS/2 up and running, but don't have any of the truly ancient versions I used to use. Instead, I am using a copy of eComStation 1.1, and it seems to be working fine. However, something looks a little fishy: All of the OS-level exceptions I get raised are of type EInvalidOp ($C000000097), rather than of type EOverflow, EZeroDivide, etc. Is this something I have broken…