Ok, starting to check the whole code and here my results:

If i change the "var i,j,k,l,m,t,isteps;" to "int i,j,k,l,m,t,isteps;" should works.

I noticed also, if we uncomment this line "if(you == NULL) error("AAA"); // <- hier" will only works with "var i,j,k,l,m,t,isteps;"
But "int i,j,k,l,m,t,isteps;" will only works with "if(!you) error("AAA"); // <- hier"