Katarzyna (branicka_k)  uses AutoCAD for Windows.

The case of the crash is in the font which used in OPIS_SCHODY text style in her drawing - Bahnschrift SemiLight SemiCondensed.

SemiCondensed variations of that font (Bahnschrift ) cases AutoCAD for Windows to crash when printing or saving to PDF. Workaround is to change Text Style to some other variation of Bahnschrift font (don't use SemiCondensed variation) and AutoCAD will not crash.