[sherman]

Originally Posted by dmapr

This is what happened when I tried it on the Literata font:

What version of FontForge and Literata are you using?

I tried it with the version of Literata I have (1.001) and it works fine.

My FontForge version is 2015-08-04

Here's what I get when I run almost the same command as you:

C:\Users\sherm\Documents\Fonts\Literata\Original>"C:\Program Files (x86)\FontFor
geBuilds\bin\ffpython.exe" "C:\Users\sherm\OneDrive\Documents\Scripts\KoboifyFon
ts-0.1.py" -r literata.otf -i literata-italic.otf -b literata-bold.otf -B litera
ta-bold-italic.otf -s -k -p "Literata"
This font contains both a 'kern' table and a 'GPOS' table.
  The 'kern' table will only be read if there is no 'kern' feature in 'GPOS'.
30

Saving koboified\Literata-Regular.ttf. . .

Note: On Windows many apps can have problems with this font's kerning, because 2
527 of its glyph kern pairs cannot be mapped to unicode-BMP kern pairs (eg, they
 have a Unicode value of -1) To avoid this, go to Generate, Options, and check t
he "Windows-compatible 'kern'" option.
This font contains both a 'kern' table and a 'GPOS' table.
  The 'kern' table will only be read if there is no 'kern' feature in 'GPOS'.
27

Saving koboified\Literata-Bold.ttf. . .

Note: On Windows many apps can have problems with this font's kerning, because 2
393 of its glyph kern pairs cannot be mapped to unicode-BMP kern pairs (eg, they
 have a Unicode value of -1) To avoid this, go to Generate, Options, and check t
he "Windows-compatible 'kern'" option.
This font contains both a 'kern' table and a 'GPOS' table.
  The 'kern' table will only be read if there is no 'kern' feature in 'GPOS'.
29

Saving koboified\Literata-Italic.ttf. . .

Note: On Windows many apps can have problems with this font's kerning, because 2
936 of its glyph kern pairs cannot be mapped to unicode-BMP kern pairs (eg, they
 have a Unicode value of -1) To avoid this, go to Generate, Options, and check t
he "Windows-compatible 'kern'" option.
This font contains both a 'kern' table and a 'GPOS' table.
  The 'kern' table will only be read if there is no 'kern' feature in 'GPOS'.
33

Saving koboified\Literata-BoldItalic.ttf. . .

Note: On Windows many apps can have problems with this font's kerning, because 2
691 of its glyph kern pairs cannot be mapped to unicode-BMP kern pairs (eg, they
 have a Unicode value of -1) To avoid this, go to Generate, Options, and check t
he "Windows-compatible 'kern'" option.

C:\Users\sherm\Documents\Fonts\Literata\Original>pause
Press any key to continue . . .