Replace glyph ligatures of three or more characters. The program recognizes it when it reads glyph ligatures from a single base (Marks).
Replace glyph ligatures of three or more characters with glyph ligatures of three or more characters. The
program recognizes it when it is a single base character (Marks) Diacritics glyph ligature.
Thank you very much and I apologize for the poor English writing.
Do you want to make a ligature, if so then you can add it through the OpenType Designer.
As you can see in the picture, the structure reads one letter and piles up the diacritical marks on one letter.
In your case you have a ligature that supports 3 base components for each anchor.
I’m very sorry, I don’t care about the dark part in red. I hope it matches the numbers three and three.
The problem has been solved, thank you very much. 
That is good to know!
Can you please share the solution?
Thank you so much, genius Erwin Denissen .
I learned a lot from your enjoyable lectures on programming and creating fonts, especially the Arabic language…
I solved the problem by:
I converted a contextual substitution ligature table
(#GSUB lookup type Ligature)
to a single substitution table
(#GSUB lookup type SingleSubstitution)
Attached are photos and a sample of the project.
…
I reiterate my gratitude for your sincere efforts, our professor: Erwin Denissen
Yes, that looks good. The OpenType Designer allows you to implement all you need for complex scripts like Arabic.
