Помогите с ошибкой

[Денис!]

выскакивает во такая ошибка. как исправить дам плюсик.

C:\Users\Администратор\Desktop\так себе\gamemodes\FL.pwn(19293) : error 017: undefined symbol "OnPropUpdate"

сама команда

    if(strcmp(cmd, "/sellmats", true) == 0)
	{
	    new cashmade;
	    new tmpcar;
	    if(IsPlayerConnected(playerid))
		{
  			tmpcar = GetPlayerVehicleID(playerid);
			if(!IsAMatsCar(tmpcar))
			{
				SendClientMessage(playerid,COLOR_GREY," * Вы не в фургоне Rifa!");
				return 1;
			}
			if(MatHaul[tmpcar-rifacar[0]][mLoad] == 0)
			{
				SendClientMessage(playerid, COLOR_GREY, " * Фургон пуст, вернитесь в доки, чтобы купить компоненты!");
				format(string, sizeof(string), " * Компоненты материалов: %d/%d.", MatHaul[tmpcar-rifacar[0]][mLoad],MatHaul[tmpcar-rifacar[0]][mCapasity]);
				SendClientMessage(playerid, TEAM_GROVE_COLOR, string);
				return 1;
			}
			if (PlayerToPoint(5, playerid,MatInfo[0][mtEntranceX], MatInfo[0][mtEntranceY], MatInfo[0][mtEntranceZ]))
			{
				//printf("Found House :%d",i);
				for(new l = MatHaul[tmpcar-rifacar[0]][mLoad]; l > 0; l--)
				{
					if(MatInfo[0][mtProducts] == MatInfo[0][mtMaxProducts])
					{
						GameTextForPlayer(playerid, "~r~Our stores are full", 5000, 1);
						format(string, sizeof(string), " * Вы продали компоненты за $%d.", cashmade);
						SendClientMessage(playerid, TEAM_GROVE_COLOR, string);
						format(string, sizeof(string), " * Компоненты материалов: %d/%d.", MatHaul[tmpcar-rifacar[0]][mLoad],MatHaul[tmpcar-rifacar[0]][mCapasity]);
						SendClientMessage(playerid, TEAM_GROVE_COLOR, string);
						PlayerPlaySound(playerid, 1052, 0.0, 0.0, 0.0);
						return 1;
					}
					if(MatInfo[0][mtPriceProd] > MatInfo[0][mtTill])
					{
						GameTextForPlayer(playerid, "~r~We Cant Afford The Deal", 5000, 1);
						format(string, sizeof(string), " * Вы продали компоненты за $%d.", cashmade);
						SendClientMessage(playerid, TEAM_GROVE_COLOR, string);
						format(string, sizeof(string), " * Компоненты материалов: %d/%d.", MatHaul[tmpcar-rifacar[0]][mLoad],MatHaul[tmpcar-rifacar[0]][mCapasity]);
						SendClientMessage(playerid, TEAM_GROVE_COLOR, string);
						PlayerPlaySound(playerid, 1052, 0.0, 0.0, 0.0);
						return 1;
					}
					MatHaul[tmpcar-rifacar[0]][mLoad]--;
					MatInfo[0][mtProducts]++;
					cashmade = cashmade+MatInfo[0][mtPriceProd];
					GivePlayerMoney(playerid,MatInfo[0][mtPriceProd]);
					if(MatHaul[tmpcar-rifacar[0]][mLoad] == 0)
					{
						GameTextForPlayer(playerid, "~r~Truck is empty, return to the stock house", 5000, 1);
						format(string, sizeof(string), " * Вы продали компоненты за $%d.", cashmade);
						SendClientMessage(playerid, TEAM_GROVE_COLOR, string);
						format(string, sizeof(string), " * Компоненты материалов: %d/%d.", MatHaul[tmpcar-rifacar[0]][mLoad],MatHaul[tmpcar-rifacar[0]][mCapasity]);
						SendClientMessage(playerid, TEAM_GROVE_COLOR, string);
						PlayerPlaySound(playerid, 1052, 0.0, 0.0, 0.0);
						return 1;
					}
				}
				OnPropUpdate();
				return 1;
			}
			else
			{
				SendClientMessage(playerid,COLOR_GREY," * Вы не на фабрике San Fierro!");
				return 1;
			}
		}
	}