And these code
java.lang.NoSuchFieldError: radarmode
at com.maddox.il2.objects.air.CockpitMIG_21MF.radarclutter(CockpitMIG_21MF.java:464)
at com.maddox.il2.objects.air.CockpitMIG_21MF.reflectWorldToInstruments(CockpitMIG_21MF.java:386)
at com.maddox.il2.objects.air.Cockpit$Draw.preRender(Cockpit.java:707)
Ah... I see.
"Too many faces" errors are not the reason of serious game crashing.
Instead of something bad around it, my MiG-21S doesn't behave such, perhaps some weapons' 3D has that problem - only using it outputs "Too many faces" errors.
Or something PC environment / video card / driver / settings problems as Tom2 says.
True reason of crashing is classfile conflict/mismatch.
Both - MiG-21PF pack and MiG-21 3rd Generation pack - have the same name classfiles "7657EEBC19555974" and "BAE14E84F8BB2860".
MiG-21PF ones are old , and MiG-21 3rd ones are newer.
Only MiG-21 3rd one has new functions and parameters like "radarmode".
After installing both MiG-21PF pack and MiG-21 3rd Generation pack , the same name classfiles but different contents exist in #SAS folder , when folders names are not changed from "MiG_21" and "000_MiG-21_Third_Generation" , the folder "000_MiG-21_Third_Generation" is superior and called right, no conflicts.
But in some reason, old "MiG_21" classfiles are read.
When you rename the names of the old classfiles in "MiG_21" folder adding minus before the filenames to "-7657EEBC19555974" and "-BAE14E84F8BB2860" , newer 3rd ones are read right , error will be solved.