I need to fix something in an existing font.
When I open the font and export it (even without any change) I get this error. Can someone help and explain what this means?
This looks like a positioning rule that could not successfully be imported from the font file. If you can send us the file (via private message or via email to support at glyphsapp) we’ll have a look.
Thanks a lot for the quick feedback. I will send you a mail.