I cannot put air filters in machines, I try and it says that the air filter can't be smelted

I am using bob's and angels and I have the setting to use their materials

sry was on vacation, ill check it out asap

are you trying to put in the filters from my mod or the ones from angels?

I have angels mods, but I can see only one kind of filtee

i too have this problem but not until i changed settings to use bobs and angels items

ok just did a series of tests. i removed each tick in mod settings and retried to insert filter. it worked only when all the angels / bobs ticks were removed.

gonna have to test this one out extensively

You are probably using the wrong air filter, the one from Factorio Extended Pus.