save you.x in *.txt with ent_next doesen't work :(

///////////////////////////////
#include <acknex.h>
#include <default.c>
#include <strio.c>;
///////////////////////////////
function open_model()
{
	wait(1);
	ENTITY* TestEnt;
	char* filename = file_dialog("Replace model","*.mdl;*.hmp;*.wmb");
	if (filename)
	{
		TestEnt = ent_create (filename,camera.x,NULL);
	}
}
function main()
{
	STRING* s = "    ";
	VECTOR temp;
	while(1){
		//load a mdl
		if(key_o){
			open_model();
			while(key_o)wait(1);
		}
		// save you,x in mydile.txt
		if(key_s){
			STRING* s = "    ";
			for(you = ent_next(NULL); you!=NULL; you = ent_next(you)){
				str_for_num(s,you.x); 
			} 
			var filehandle = file_open_write ("myfile.txt");
			file_str_write(filehandle,s);
			file_close (filehandle);	
			while(key_s)wait(1);
		}
		wait(1);
	}
}

you = ent_next(NULL); // retrieve first entity
while (you) // repeat until there are no more entities
{ 
   // Save,...
   you = ent_next(you); // get next entity
}

insteat of for.

///////////////////////////////
#include <acknex.h>
#include <default.c>
#include <strio.c>;
///////////////////////////////
function main()
{
	level_load("null.wmb");
	STRING* s = "    ";
	char* filename = file_dialog("Replace model","*.mdl;*.hmp;*.wmb");
	if (filename)
	{
		ent_create (filename,nullvector,NULL);
	}
	STRING* s = "hallo welt";
	var filehandle = file_open_write ("myfile.txt");
	file_str_write(filehandle,s);
	file_close (filehandle);	
}

///////////////////////////////
#include <acknex.h>
#include <default.c>
#include <strio.c>;

///////////////////////////////


///////////////////////////////
function open_model()
{
	wait(1);
	char* filename = file_dialog("Replace model","*.mdl;*.hmp;*.wmb");
	if (filename)
	{
		ent_create (filename,camera.x,NULL);
	}
}
function main()
{
	level_load(NULL);
	
	STRING* s = "    ";
	VECTOR temp;
	while(1)
	{
		if(key_o)
		{
			open_model();
			while(key_o)
				wait(1);
		}
		
		
		// save you,x in mydile.txt
		if(key_s)
		{
			STRING* s = "    ";
			
			you = ent_next(NULL); // retrieve first entity

			while (you) // repeat until there are no more entities
			{ 
			   str_for_num(s,you.x); 
			   var filehandle = file_open_write ("myfile.txt");
				file_str_write(filehandle,s);
				file_close (filehandle);
			   you = ent_next(you); // get next entity
			   wait(1);
			}

			
			
			while(key_s)wait(1);
		}
		
		wait(1);
	}
}