Movie Open Error -43 ?

What does OSErr -43 indicate ?? This error is reported when I'm creating a movie using the below in a thread.

OSErr err=NewMovieFromDataRef(&newMovie,newMovieActive,0,outDataRef,outDataRefType);

The error is reported when I'm deleting a clip and trying to paste some other clip into the same folder in my application. When a click a clip for copying, the selected clip is loading its movie using

err=NewMovieFromDataRef(&movie,newMovieActive|newMovieAsyncOK|newMovieIdleImportOK,0,outDataRef,outDataRefType);

Please help.

Thanks in advance