We were able to import dxf-data, which consistet of unknown color-data in acb colorbook from autocad. After importing this data, Microstation produces faulty colors, which may crash the file.

I would like to habe better error handling, that MS at least informs the client, that there are colors which cannot be processed in MS. Actually MS just imports these elements without any messages, once they are inside the dgn-file, it has to be realised by the user and afterwards needs to be eliminated with a lot of effort.