[iggy1]

Add a print to see what value BusID is. Only if it is none zero the dialog will be shown.

pawn Код:

COMMAND:busmenu(playerid, params[])
{
    // Setup local variables
    new OptionsList[200], DialogTitle[200], BusID;

    // Check if the player has logged in
    if(APlayerData[playerid][LoggedIn] == true)
    {
        BusID = APlayerData[playerid][CurrentBusiness];
        if(!strcmp(ABusinessData[BusID][Owner], APlayerData[playerid][PlayerName]))
        {
            // Check if the player is inside a business
            
            printf("BusID == %d", BusID);
            if (BusID != 0)
            {
                //if BusID is any number exept zero this will be executed.
                format(DialogTitle, sizeof(DialogTitle), "Select option for %s", ABusinessData[APlayerData[playerid][CurrentBusiness]][BusinessName]);
                format(OptionsList, sizeof(OptionsList), "%sChange business-name\n", OptionsList);
                format(OptionsList, sizeof(OptionsList), "%sUpgrade business\n", OptionsList);
                format(OptionsList, sizeof(OptionsList), "%sRetrieve business earnings\n", OptionsList);
                format(OptionsList, sizeof(OptionsList), "%sSell business\n", OptionsList);
                format(OptionsList, sizeof(OptionsList), "%sExit business\n", OptionsList);
                // Show the businessmenu
                ShowPlayerDialog(playerid, DialogBusinessMenu, DIALOG_STYLE_LIST, DialogTitle, OptionsList, "Select", "Cancel");
            }
            else
            {
                SendClientMessage(playerid, 0xFF0000FF, "You're not inside a business");
            }
        }
        else
        {
            SendClientMessage(playerid, 0xFF0000FF, "You're not the owner of this business");
        }
    }
    else
    {
        return 0;
    }

    // Let the server know that this was a valid command
    return 1;
}

TIP: use [pawn] tags instead of [code].