Do not write bogus data to tthints file. When a point index problem existed in a given glyph, the resulting hinting instruction line contained empty data, which made the hint input choke. No more!
Do not write bogus data to tthints file.
When a point index problem existed in a given glyph, the resulting hinting instruction line contained empty data, which made the hint input choke. No more!

adobe-type-tools/fontlab-scripts