Connection to license service failed; license service address is not valid...

Question

Connection to license service failed; license service address is not valid, or license service is stopped (or does not respond), ConnectToCompanyReturn = -131 in ConnectToCompany()
This is the error I received from an addon.  It works running it on the server where the SAP license is but as soon as a SAP client starts and the addon tries to connect I receive the error but I don't understand there's no different about the SAP code given to connect an addon.
Here's the method in which it fails
private int ConnectToCompany()
    int ConnectToCompanyReturn = 0;
    // // Establish the connection to the company database.
    ConnectToCompanyReturn = oCompany.Connect();
    if (ConnectToCompanyReturn != 0)
        string Message = oCompany.GetLastErrorDescription() + ", ConnectToCompanyReturn = " + ConnectToCompanyReturn.ToString() + " in ConnectToCompany()";
        System.Windows.Forms.MessageBox.Show(Message);
        System.Threading.Thread.CurrentThread.Abort();
    return ConnectToCompanyReturn;
It just hangs on the ConnectToCompanyReturn = oCompany.Connect();
I did addons for about 8 years.  This is the first time I see an addon not connecting like that.  Any ideas ?
SAP 9 PL09 Hotfix 1
The SAP client works fine,  Coresuit addon connects all right so I'm lost here !

Answer 1

Here's the code used in the addon which is the same since 2005 followed by the code that calls these methods from the constructor.  These methods are called the same way.
private bool SetApplication()
    //  Use an SboGuiApi object to establish connection
    //  with the SAP Business One application and return an
    //  initialized appliction object
    string sConnectionString = "";
    SAPbouiCOM.SboGuiApi SboGuiApi = null;
    try
        if (System.Diagnostics.Debugger.IsAttached && System.Environment.GetCommandLineArgs().Length < 2)
            System.Windows.Forms.MessageBox.Show("SAP isn't running or you're trying to debug in Release mode...");
            return false;
        SboGuiApi = new SAPbouiCOM.SboGuiApi();
        //  By following the steps specified above, the following
        //  statment should be suficient for either development or run mode
        sConnectionString = System.Environment.GetCommandLineArgs().GetValue(1).ToString().Trim();
        // Connect to a running SBO Application
        SboGuiApi.Connect(sConnectionString);
        //  Get an initialized application object
        SBO_Application = SboGuiApi.GetApplication(-1);
        return true;
    catch (Exception ex)
        throw new Exception(ex.Message);
private int SetConnectionContext()
    int setConnectionContextReturn = 0;
    try
        string sCookie = null;
        string sConnectionContext = null;
        // First initialize the Company object
        oCompany = new SAPbobsCOM.Company();
        // Acquire the connection context cookie from the DI API.
        sCookie = oCompany.GetContextCookie();
        // Retrieve the connection context string from the UI API using the
        // acquired cookie.
        sConnectionContext = SBO_Application.Company.GetConnectionContext(sCookie);
        // Before setting the SBO Login Context make sure the company is not
        // connected
        if (oCompany.Connected == true)
            oCompany.Disconnect();
        // Set the connection context information to the DI API.
        setConnectionContextReturn = oCompany.SetSboLoginContext(sConnectionContext);
        return setConnectionContextReturn;
    catch (Exception ex)
        throw new Exception(ex.Message);
private int ConnectToCompany()
    int Result = 0;
    // Establish the connection to the company database.
    Result = oCompany.Connect();
    if (Result != 0)
        string Message = oCompany.GetLastErrorDescription() + ", ConnectToCompanyReturn = " + Result.ToString();
        System.Windows.Forms.MessageBox.Show(Message);
        System.Threading.Thread.CurrentThread.Abort();
    return Result;
This is in the Constructor
public Addon()
    //  set SBO_Application with an initialized application object
    SetApplication();
    SetFilters();
    if ((SetConnectionContext() == 0))
        if (ConnectToCompany() == 0)
            SBO_Application.AppEvent += new SAPbouiCOM._IApplicationEvents_AppEventEventHandler(SBO_Application_AppEvent);
            SBO_Application.MenuEvent += new SAPbouiCOM._IApplicationEvents_MenuEventEventHandler(SBO_Application_MenuEvent);
            SBO_Application.ItemEvent += new SAPbouiCOM._IApplicationEvents_ItemEventEventHandler(SBO_Application_ItemEvent);
            SBO_Application.FormDataEvent += new _IApplicationEvents_FormDataEventEventHandler(SBO_Application_FormDataEvent);
        if (SBO_Application.Language == BoLanguages.ln_French)
            SBO_Application.StatusBar.SetText("Addon Wizard de prix activé...", BoMessageTime.bmt_Short, BoStatusBarMessageType.smt_Success);
        else
            SBO_Application.StatusBar.SetText("Addon Price Wizard actived...", BoMessageTime.bmt_Short, BoStatusBarMessageType.smt_Success);