Subtable Overflow in lookup: 9 type: ligature

[sanjay]

Hello.
I made about 850 icons.
And I want to let the icon be entered through ligatures.

Example code:
lookupflag IgnoreMarks;
lookup liga1 {
sub colon a d d underscore c i r c l e underscore f i l l colon by add_circle_fill.icon;
sub colon a d d underscore c i r c l e colon by add_circle.icon;
sub colon a d d underscore s q u a r e underscore f i l l colon by add_square_fill.icon;
sub colon a d d underscore s q u a r e colon by add_square.icon;
} } liga1;
liga2 {
…
liga2;

However, an error occurred.
Problem compiling “GSUB” table
Subtable Overflow in lookup: 9 type: ligature

I also tried the method in the link below, but it didn’t work.

9000+ Ligatures result in subtable overflow

In this case you are lucky. You can split the liga feature in two lookups. This just barely fits then. split it like this: lookupflag IgnoreMarks; lookup liga1 { sub eight eight eight eight by eight_eight_eight_eight.liga; … sub one zero zero zero by one_zero_zero_zero.liga; } liga1; lookup liga2 { sub seven eight eight eight by seven_eight_eight_eight.liga; … sub two zero by two_zero.liga; } liga1;

Is there a solution?

[mekkablue (Rainer Erich Scheichelbauer)]

You have to reduce substitutions. Or you add the the use extension flag to your lookups: OpenType Feature File Specification | afdko

[GeorgSeifert]

Add the use extension flag as mentioned above but also split the rules into two or there lookups.
Could you send me the .glyphs file for testing?

[sanjay]

It works perfectly!
Thank you for your response.