🎯 Subject of the issue

As stated in title. Fonts which have fullnames containing characters illegal to the filesystem are not accounted for, and will cause the patcher to fail when producing final output. This could be worked around with an output file flag, or code to substitute illegal characters before final output.

🔧 Your Setup

• Which font are you using ?
  int10h -- Px437 DOS/V re. JPN16 (Px437_DOS-V_re_JPN16.ttf)

• Which terminal emulator are you using (e.g. iterm2, urxvt, gnome, konsole)?
  Windows Terminal 1.8

• Are you using OS X, Linux or Windows? And which specific version or distribution?
  Windows 10. The issue most likely exists (with slight variants in allowed characters) for all systems.