[CLOSED] Failed to compile the code

On editing anything in OpenType Layout Feature Code Editor - OTLFD, it returns the error Failed to compile the code.
For your reference, screenshots have been attached.
In the screenshot, you see that in Line.#.2442 entry is NULL
if I changed NULL to value 0 then it’s ignored otherwise it returns an error.
Ref2.png
Ref1.png

Line #2442 is just a warning, so it should compile, but the error is the empty lookup at #4855. It should compile after you have removed that lookup.

Can you edit and compile with the Adobe feature syntax (FEA) instead of OTLFD? That is nowadays the preferred syntax.

No, I am just using OTLFD
okay, I’ll remove the empty lookup.

Better use the upper-left combo box to switch from OTLFD to FEA.