I'm getting a 'Teigha Library Error' when exporting some DWGs. Does anyone know what this is?
Yes, dwg 2018 is too new for current VW2017. The Teigha libraries have been updated for dwg2018 but those are not implemented in VW2017. I think they will be in VW 2018.
ODA has a DWG converter that you can use "Teigha File Converter" which can be found at the following URL and is available for Win, Mac etc. (they also have a viewer for multiple platforms)