Hi,
while I trying to export the file I got this error:
Subtable Overflow: tableType: OTGPOS LookupIndex: 6 SubTableIndex: 0 ItemName: lookupList ItemIndex: 0
the typeface has many kerning groups and it has large amount of glyphs
I have already tried adding use extension kerning parameter to custom parameters in font info
and I have checked that blue Botton