[Basicz]

For you, it works 100%

In my logic, it works 0%

pawn Код:

undefined symbol "playerFile"

pawn Код:

#define playerFile "%s.ini"
stock getini( playerid ) {
    new name[24]; GetPlayerName( playerid, name, 24 ); new file[ 64 ]; format( file, playerFile, name );
    return file;
}

You didn't even load it stats when a people connects.

pawn Код:

public OnPlayerConnect( playerid )
{
    if ( fexist( getini( playerid ) ) )
    {
        INI_ParseFile( getini( playerid ), "position", .bExtra = true, .extra = playerid );
    }
 
    return 1;
}

forward position( playerid, name[], value[] );
public  position( playerid, name[ ], value[ ] )
{
    INI_Float( "LastX", playerInfo[ playerid ][ posX ] );
    // .......

    return 1;
}

// AND
stock onPlayerLogout( playerid )
{
    new
        INI: pFile = INI_Open( getini( playerid ) )
    ;

    INI_WriteFloat(pFile, "LastX", PlayerInfo[playerid][pLastX]);
    INI_WriteFloat(pFile, "LastY", PlayerInfo[playerid][pLastY]);
    INI_WriteFloat(pFile, "LastZ", PlayerInfo[playerid][pLastZ]);

    INI_Close(pFile);

    return 1;
}

public OnPlayerDisconnect( playerid )
    return onPlayerLogout( playerid );

I guess, it worked in your server, but it didn't even compile ( the tutorial )
I guess, you didn't used Y_INI.

Not bad, you are good in explaining.