error 029: invalid expression, assumed zero

[IlyaPawn)]

CMD:time(playerid, params[])
{
    new str[256];
    new second,minute,hour;
    new day,month,year;
    gettime(hour,minute,second);
    getdate(year,month,day);

    format(str, sizeof(str), "Date:%d:%d:%d\nTime:%d:%d:%d", day,month,year,second,minute,hour);
    
    return GameTextForPlayer(playerid, str, 5000, 1);
}

CMD:stats(playerid, params[]))
{
    new str1[256];
    new nick[MAX_PLAYER_NAME];
    format(str1, sizeof(str1), "???: %s", GetPlayerName(playerid, nick, sizeof(nick)););
    return ShowPlayerDialog(playerid,0,msgbox, str1, "1", "2");
}

gamemodes\alone.pwn(298) : error 029: invalid expression, assumed zero
gamemodes\alone.pwn(302) : error 021: symbol already defined: "format"
gamemodes\alone.pwn(303) : error 010: invalid function or declaration
gamemodes\alone.pwn(311) : warning 203: symbol is never used: "nick"
gamemodes\alone.pwn(311) : warning 203: symbol is never used: "str1"