Some LUA questions

Hi, i have a few LUA questions. I hope someone can help.

1.) How can i write something from BM into a LUA variable so i can use the variable in LUA?

2.) How can I change the path, LUA is searching for files when i do a loadfile in LUA

3.) Is there a way to find out in which line and what kind of error occured in a LUA script? At the moment my BM programm crashes when there is an error in the LUA script.

Greetings Mirko

1.

lua_pushstring( ls, "yourVariable" )
' Push the new value here, like..
' lua_pushstring( ls, "foobar" )
lua_settable( ls, LUA_GLOBALSINDEX )

2. It's relative to the application's root, so figure out where something is from there.

3. It's always written error information to the console for me, so I can't help you there.