I have a font currently consisting of about 4700 glyphs (it’s a mathematics font), many of which are suffixed. However, when FontCreator 15 generates the corresponding OTF file, only about 3700 glyphs appear in the OTF file. It seems as though entire categories of suffixed glyphs get eliminated in the process (and arguably a few others). Furthermore, it appears as though placing all of the glyph names in the @Base class in the OTF editor is still not enough to spare them. Why would FontCreator do this and is there anything I can do to preserve all of the glyphs when the OTF is created?
So, I believe I have answered my own question here. If you go to Tools > Options > Font, you can uncheck the box “Exclude unused glyphs (recommended)”. By doing so, when you export your project, everything will be preserved. 