Unknown file format: Too many Blue Zones

yanone · 1 Jan 2018, 10:33

I've ran across a UFO that I've created with 10 Blue Zones and RoboFont Version 1.4 (built 1301142150) refuses to open them:
The document “Antithesis-Italic.ufo” could not be opened. The file isn’t in the correct format.

After I manually deleted a few zones, it opens fine. I've never heard that there can be too many zones, for sure not 10, so I consider this to be a bug.
Cheers,
Yanone

frederik · 19 Feb 2013, 20:06

Thanks Bas

Yanone: how do you end up with a UFO file with 10 zones? (just curious)

yanone · 19 Feb 2013, 19:29

Before having read your reply I just looked up the UFO3 specs and found the same info.
Thank you.

bas · 19 Feb 2013, 19:25

There are some limitations with Blue Zones.

"Up to seven pairs may be given in the BlueValues array; the first pair must be the baseline pair."

"Up to five pairs (10 integers) may be specified in the OtherBlues array"

Read page 36-38 from T1spec.pdf
http://partners.adobe.com/public/developer/en/font/T1_SPEC.PDF