It's been a couple- three decades since I've had to deal with DXB in any context, but one of our structural people sent me a detail drawing that appears to be created by importing a DXB file, of possible imported from HPGL -- nothing in it except line segment (and solids for arrowheads) All the text s nothing except lines e.g. the letter "O" is 20 line segments.

Any suggestions on how to get this POS into a usable form?