Hi.I''ve managed to create an engine wich unify all it''s parts through a console wich is using lua to manage the rest.I have some lua threads(lua_State * pointers) in each of the engine parts(renderer, input system, etc) in wich i execute specific commands.my problem is:i want to switch through this pointers so one of it and only one should be active at a given time.so let''s say i have: lua_State * x1; lua_State * x2;//both of them are initialized and are running //command whenever i want //and i have lua_State * current = NULL; What I want is to do operations like current = x1; or current = x2; and to run the commands in the current thread.so the idea is so i can switch between the states.the build of the project runs ok but the problem appears on execution where i get an error: adress "an address in hexa of the specified thread" cannot be "read".so why''s that and how can i assign to my "current" pointer one of the other pointers.Normally it should work cause they have the same type, but it doesn''t.. please help Mihai

yes, i have each thread is created separately.anyway, i''m pretty newbie to Lua, so what i''ve done till now(what i''ve described before and a little version of opengl) for me is much.i think that i wanned multithreading, because i want that threads to run one in paralel with each other, wich i don''t think i can do with the soultion u gave me.

well, what about my problem? the threads are working independently, there is no doubt.the only error appears when i am trying to assign to a pointer the value of another pointer. Another fact(wich i forgot to mention) is that the pointer named above current is null and is not initialized with lua_open. is this the problem?

Mihai

depends of what thread i want to assign to the current thread.so if i want to assign the first one created, in the debugger it''s says somthing about afxwindowproc..bla...bla(the dialog window creation) and then it writes 00...000() and and that''s all(it''s an error in disassembley and i don''t know it, only C).and when i start debugging it says something about acces violation at 0000...005.if i try to assign another thread, there is another address but the same error.it''s pretty strange.

Mihai

well, it looks like i''ve missunderstood the problem.it gives the error if i''m trying to do any assignment,not that specific one(even int i = 1.so i''ll try to put it somewhere else.anyway, thanks very much for your atention.i''ll post any problem if i''ll have some more.

thanks again

Mihai