DBX CAS 4 Error happens when open DGW file or save DGN to DWG file forMicroStation V8i SS3
1: remove AutoDesk RealDWG 2012/2010, and remvoe all the files withprefix named acdb* in C:\Windows\ folder and all sub-folders afterbackup those files.2: Then reinstall AutoDesk RealDWG 2012/2010 in the package ofMicroStation V8i SS3/SS2. MicroStatio V8i SS3 will be able to work onDWG files.