In my struct which based on Items I create new actor:

carP.load("Obj/Pojazdy i helikopter/Radiowoz/Nadwozie.phys");
carA.create(carP);
carA.pos(pos());

But now I've got problems because I draw mesh:

case RM_SOLID:
carM.draw(carA.matrix());

and when other cars aren't in my view range mesh dissapear. Except that I've got actors which I add in .obj file in WE. They are near new created actors and I collide wiht them. When I delete them by actor.del(); or delete in .obj file my actor and mesh doesn't create. Why I have these problems?

you need to handle properly 'save' 'load' methods

save the path to physical body (f.putStr(Physs(phys_ptr)))
save actor data actor.save(f);

when loading, load physical body if(phys_ptr=Physs(f.getStr())) and create actor.create(*phys_ptr)
and load actor data actor.load(f)

I made this:
but nothing change.

you forgot actor::loadState

Still the same :( Mesh still disappear when another objects is for example behind me.

EDIT: Objects with the same type.

http://img504.imageshack.us/img504/2056/errf.jpg

What does this error means? Why possibly I got it?

incorrect saving/loading? its just a guess. you have an error somewhere

When I'm saving mesh should I save path too? Or only put mesh.save(f); ? What should I save and load? All floats and integers variables? Or something else too.

only path needs to be saved (in mesh)

you should save everything that you have in your custom class

Unhandled exception at 0x0054f74b in Tutorials.exe: 0xC0000005: Access violation reading location 0x00000000. I've got this error and arrow on this line Ptr validElm(Int i){return absElm(valid[i]);} in struct _Memx

when i'm trying to load my world. Why it could be? I kow that it's with my members but in BM I don't see that they are aving or loading.

Sholud I load in ::Load(File f) all paths to files like particles, sounds, meshs, actors which I load mannually in constructor? Can I make it like in BM (SaveNonSavedParemeters() function)?

yes, you can use SetNonSavedParemeters, its up to you

How can I save Wheels? I must create it again? I have saved only wheels mesh paths but when I load game wheels are deleted.

currently you must re-create them after loading the car actor

When I do this and load game i have this:

http://img204.imageshack.us/img204/209/scrsh.jpg

I create whells by this code: wheel[0].create(actor,Matrix().setPos(actor.pos()+Vec( 1,-0.7, 1.9)),wp); // left -front

Maybe you know why?