Export error Variable font

Hello, I have an issue when I try to export my font as a Variable font. I attached a screenshot of the window popped up.

  • OTF Settings: Outline Flavour > PostScript CFF
    File Format > .otf
  • Variable Fonts Settings: File Format .ttf
    How can I fix it?

There is probably an outside corner overlap in one of the masters.

I tried to fix corners so they don’t overlap but the error still exist…
Can I send you the file? So I can understand better the process to fix it.

Yes. Please send the file. Either with a direct message in the forum or by email to support at this domain.


The problems are with corner components. In the r and f, you have this situation:
Screen Shot 2023-08-16 at 15.59.02 Screen Shot 2023-08-16 at 16.17.49

If the corner is inserted into the path, there is one node missing and to the outlines are not compatible any more.

You can redraw the corners like this:
Screen Shot 2023-08-16 at 16.18.25 Screen Shot 2023-08-16 at 16.18.22

That will produce an overlap that will persevere that node.
Screen Shot 2023-08-16 at 16.18.11 Screen Shot 2023-08-16 at 16.18.07

Thank you so much Georg!

Now it works and I know the mistake, good to know for the future.

Or better yet, delete the extremum point.

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