Starting bots by messaging

[ghost]

Okay so I wanted to start bots by messaging them ".start (#)" or ".stop (#)" because sometimes one crashes and I want to not have to leave my computer to go to the server. Anyway here is my code:

    private readonly BotManager Bmanager;
    private int SIndex = -1;

            else if (message.StartsWith(".start")) //This is in the message area
            {
                if (message.Length >= 7)
                {
                    SIndex = -1;
                    int.TryParse(message.Substring(7), out SIndex);
                    Bmanager.StartBot (SIndex);
                    Bot.log.Success("Started bot: " + SIndex);
                }
            }
            else if (message.StartsWith(".stop"))
            {
                if (message.Length >= 6)
                {
                    SIndex = -1;
                    int.TryParse(message.Substring(6), out SIndex);
                    Bmanager.StopBot (SIndex);
                    Bot.log.Success("Stopped bot: " + SIndex);
                }
            }

When I try to do this I get this error:

[Keymac [BOT] 2013-07-30 08:41:25] ERROR: Unhandled exceptions in bot Keymac [BOT] callback thread: System.NullReferenceException: Object reference not set to an instance of an object at SteamBot.KeyUserHandler.OnMessage (System.String message, EChatEntryType type) [0x00c3a] in /home/twg/Desktop/SteamBot/SteamBot/KeyUserHandler.cs:270 at SteamBot.Bot.m__5 (SteamKit2.FriendMsgCallback callback) [0x0004b] in /home/twg/Desktop/SteamBot/SteamBot/Bot.cs:415 at SteamKit2.CallbackMsg.Handle[FriendMsgCallback](System.Action`1 handler) [0x00028] in /home/twg/Desktop/SteamBot/Lib/SteamKit2/SteamKit2/Steam3/SteamClient/CallbackMgr/CallbackMsg.cs:55 at SteamBot.Bot.HandleSteamMessage (SteamKit2.CallbackMsg msg) [0x00076] in /home/twg/Desktop/SteamBot/SteamBot/Bot.cs:404 at SteamBot.Bot.BackgroundWorkerOnDoWork (System.Object sender, System.ComponentModel.DoWorkEventArgs doWorkEventArgs) [0x00012] in /home/twg/Desktop/SteamBot/SteamBot/Bot.cs:678 at System.ComponentModel.BackgroundWorker.OnDoWork (System.ComponentModel.DoWorkEventArgs e) [0x00000] in :0 at System.ComponentModel.BackgroundWorker.ProcessWorker (System.Object argument, System.ComponentModel.AsyncOperation async, System.Threading.SendOrPostCallback callback) [0x00000] in :0

Although I think that this is the important part: System.NullReferenceException: Object reference not set to an instance of an object

[waylaidwanderer]

You can't message an offline bot and pass commands to the Bot Manager.

[ghost]

No I have 2 bots and message the online one.

[waylaidwanderer]

I'm guessing your Bmanager variable isn't actually assigned to.

Oh, and #307 - this isn't the place for programming help, but actual issues with SteamBot.

[ghost]

private readonly BotManager Bmanager;
private int SIndex = -1;