If you receive a drawing where the text appears as question marks or "missing font" errors occur, you likely need to install the Hzdx.shx file into your system.
(or use REINIT command → check "Font files"). Hzdx.shx Font
Unlike TrueType fonts ( .ttf ) which use outlines, SHX fonts use vector lines. If you receive a drawing where the text
CAD/BIM Library of free blocks - "hzdx.shx font" - CAD Forum Hzdx.shx Font