What precisely does the makeotf error ‘coverage section too large’ mean?
It is followed by a hex number in parentheses, like ‘(10da6)’. Now I realize this is larger than FFFF, probably making a table too large. I have a few pretty large OT classes in the font (900+ glyphs). Would the ‘coverage’ of those classes be ‘too large’?
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Contextual features of this sort can cause the error:
pos @LETTER @LETTER @LETTER @LETTER @LETTER' <0 10 0 0>;
If you have many of these lines, with many @LETTERs following each other and a relatively large class @LETTER, your coverage section can become too large.
But, alas, this doesn’t seem to be the full story. I kept reducing the code, and the number between parentheses kept changing, but – and this is what I don’t understand – it was not always getting smaller. So, I still don’t know what a coverage section is.