Yes, I think Iraq was in violation of 1441.
Along with prior resolutions, it required Iraq to document what happened to all its WMD. It never did. Now, I seriously wonder if it would ever be possible for any country to document what happened to all its WMD. (Note, for example, that there’s a neighborhood in North West Washington, DC where WWI-era chemical weapons were buried, and their contents leaking into the soil – I seriously doubt that the Army documented the burying of CW in that neighborhood!)
Nonetheless, I think Saddam took it a step further by trying to screw with the UN weapons inspectors in a variety of ways.
Not that any of this made it okay for the US to go off on its own and start a war, of course.