BricsCAD users that work with drawings coming from AutoCAD® will commonly find when they PRINT that the DWG To PDF.pc3 printer definition is missing. This is a special printer built-in to AutoCAD® making it unavailable to use in BricsCAD.
BricsCAD has its own built-in PDF printer called Print As PDF, so you can simply switch to that to generate a PDF print. However, this can become painful if you have a lot of drawings like this, or you need to send drawings back and forth to AutoCAD® users.
A simple solution to this problem is to take a copy of BricsCAD's Print As PDF printer definition and rename the copy to DWG To PDF. To do this run the PLOTTERMANAGER in BricsCAD. This opens the Windows file explorer at your current PlotConfigPath folder location.
In this folder you should see a printer definition called Print As PDF (see notes below if you don't).
Select the Print As PDF definition and create a copy of it in your windows explorer window, then rename it to DWG To PDF.
Now when you print drawings coming from AutoCAD® you should find that BricsCAD automatically uses your new printer definition.