[McGuffin]

Originally Posted by stjobe lua.org has something to say on the issue. As has the lua-users.org wiki. And even Stack Overflow.

well, i ve already found every links you provide (and even more).
but none of them is an answer to my question (they are all related to array with a single params), and this is why I am asking here.

Originally Posted by lyravega Shouldn't it be a.param1?

That was my first thought , and that doesnt work either, this is why I tried a more direct way with the index ...
this is tricking me i know how to do that in delphi or c++ but not in lua...