total_vertices = ent_status(entNewTerrain,0);		
if(game_load(name, 1) > 0) // previously saved data exists?
{ 	
var index = 0;			
while(index <= total_vertices) // then load the previously stored height values and apply them to the terrain
{
				// no need to load the x and y coordinates of the terrain - they can't be changed
vec_to_mesh(vector (0, 0, terrain_values_i[index]), entNewTerrain, index);
index += 1;
				
}
}

void bar()
{
	var i, file_data, file_handle;

	file_handle = file_open_read("filename");
	if(file_handle) // Check if the file exist, if not, the file handle is going to be 0
	{
		for(i=0;; i++) // for loops don't need a condition, this will work fine
		{
			file_data = file_var_read(file_handle);
			if(!file_data)
				break;

			vec_to_mesh(vector(0, 0, file_data), entity, i);
		}
                file_close(file_handle);
	}
}

...
if(file_exists("tsave.txt")) 
{ 
	
int index;
var filehandle = file_open_write("tsave.txt");
total_vertices = ent_status(terrain_level1,0);
CONTACT* c;

while(index <= total_vertices)
{
c = ent_getvertex(terrain_level1,NULL,index);  
file_var_write(filehandle,c.z);
index ++;
}
	
file_close(filehandle); // the file now contains "123456.789 1.414 "
		
}
...

if(file_exists("tsave.txt"))
{ 
		
var i, file_data, file_handle;
file_handle = file_open_read("tsave.txt");
CONTACT* c;	
		
if(file_handle) // Check if the file exist, if not, the file handle is going to be 0
{
for(i=0; i <= total_vertices; i++) // for loops don't need a condition, this will work fine
{

file_data = file_var_read(file_handle);
c = ent_getvertex(terrain_level1,NULL,i);
c.v = NULL;
c.z = file_data;
ent_setvertex(terrain_level1,c,i);
}
file_close(file_handle);
}		
}