fontlab

How to remove unused kerning pairs in Fontlab

I've just removed a good number of glyphs that I no longer want to include in my font. I deleted the glyphs, then I was able to "Clean up" my classes to remove the deleted glyphs from the classes, but the kerning pairs are still in the kern feature. Every time I try to compile, I get the "one or more glyphs in the font are missing." error with an option to generate all the missing glyphs. I've tried updating the kern feature without success.

My goal is to delete all the kerning pairs from the missing glyphs. I've done it before, but for the life of me, I can't find any answers out there.