FontForge patching issue

[fuyu]

Hi, I'm trying to patch the fonts with the FontForge according with this guide:
https://powerline.readthedocs.org/en/latest/fontpatching.html

to be able to use it in Vim with Powerline. But it doesn't work and instead I get this list of issues:

The PostScript font name "MonacoB2 Bold" is invalid.
It should be printable ASCII,
must not contain (){}[]<>%/ or space
and must be shorter than 63 characters
Warning: Mac string is a subset of the Windows string in the 'name' table
 for the UniqueID string in the English (US) language.
Warning: Mac and Windows entries in the 'name' table differ for the
 Fullname string in the language English (US)
 Mac String: MonacoB2 Bold
Windows String: MonacoB-Bold
Warning: Mac and Windows entries in the 'name' table differ for the
 PostScriptName string in the language English (US)
 Mac String: MonacoB2Bold
Windows String: MonacoB-Bold

Original Monaco font is being patched without issues. BTW, I'm using Mac.
Could you happen to know what is the problem?

[fuyu]

Okay, I was able to make it work.
Even though the patcher script should have changed the font name to "fontname for Powerline" it remained simply "MonacoB". However in Font Book it is shown as "MonacoB2 for Powerline".
It looks like a mess with font names :)

[avidrucker]

@fuyu How did you fix the issue?