OMG JavaIDL specification is vague when dealing with DSI and exception handling.

Sun's current implemeation of OMG JavaIDL specification, specifically DSI, requires successful invocation of param method before calling excep method.
Specification can be interpreted that the method param is called and
whether successful or not method except can be called.

There are differences in Sun's interpretation of the specification and that of
Visigenics. These differences will affect interoperability between the 2 orbs.
Since we use DSI for our portable skeletons, skeletons generated by Visigenics
may not work with our orb.