Hello,
Yesterday I played in mod TAntive IV interception by Bantha55. Today I have error "fatal" missing .lvl ?

What Have I to do?

[SOLVED]

I had 200 mods- maps in addon folder so I had to delete some mods. now everything is ok

Do you have v1.3 installed? It should have warned you when you have too many missions...

Cool it works again for you.
Btw off topic: 200 mods/maps? Whoah. I always though battlefront 2 has 100 maps/ mods in all.

Someone knows how many mods and maps (released) are existing?

It's not exactly about the number of folders in the addon directory, it's about the number of missions included in one map: one map or mod has several missions included. Take one map with CW conquest and GCW CTF2, it's two missions for one map folder.

About the number of maps/mods in circulation, hard to tell exactly... the maparchive lists roughly 1050 maps (counting the double versions), 15 really big mappacks and 20 big sidemods (that make major changes). Add to this a 50' of maps from SWBFfiles that I haven't added yet.
Counting side mods is not easy game because you'd have to sort out which ones are adding missions (and so use an addon folder in most of the cases) and which ones are replacing missions (with a mission.lvl modification).