Hello, a client asked me to modify the Google font Raleway. She (a graphic designer) needed the basic numerals to be different. After some back and forth of me explaining copyright, we desided to at least test it. She knew that using this modified version is not OK but wanted to at least see what it will look like.
I opened the font in my legal copy of FontLab 7 and replaced the glyphs with the .lf ones.I did no kerning and on export, I got this error message:
<p>FEA compiler error: [F] In feature 'kern' lookup 'kern' positioning rules cause an offset overflow (0x123c6) to a lookup subtable</p><p>FEA compiler error: [F] Fatal error in font "C:/Users/Admin-XXXXX/Desktop/Raleway-BoldItalic-ED.vfc" in file "" at line 17882</p><p>Features compilation failed. Trying without the [kern] feature</p><p>Font has been successfully exported to the following folder:</p><p>C:/Users/Admin-XXXXX/Desktop/Baleway/OpenType-PS</p>
I had no trouble testing the font in my copy if InDesign 2021, but she couldn't get it to replace the old unedited version on her Mac. I changed the name in the font info to "Baleway", still she couldn't do anything on her side, so the job broke down. But I am still curious of what could have caused the error message. Maybe me replacing the glyphs broke down something like the other types of numerals that were linked to them as components?