Why can't I create this appointment in Groupwise using c#?

No clue, but a different approach: send a mail with a Meeting invitation. It is more or less standardized for all Mail environments.

Here is what I am trying to do:  Create a new appointment with date, time, subject, etc. and then display the appointment using tokens.  My code is below and it seems to work fine (in a separate .cs file) but when used in my main application it gives the error: "Object does not match target type" on the following line.

appt = (GroupwareTypeLibrary.Appointment10)groupwiseAccount.WorkFolder.Messages.Add(gwAppointment, egwDraft, _missing);

This is really weird.  Why wouldn't it work in my main app all things being equal?  I cut/pasted the code in the main app to produce the code below.  And what really blows me away is that this was working before and now poof!  it doen't.

Thanks.

bob

      public static void Test()
        {
            GroupwareTypeLibrary.Application groupwiseApp;
            GroupwareTypeLibrary.Account groupwiseAccount;

            object gwAppointment = "GW.MESSAGE.APPOINTMENT";
            object _missing = System.Reflection.Missing.Value;
            object egwDraft = 4;
            string mypassword = "abc123";

            groupwiseApp = new GroupwareTypeLibrary.Application();
            groupwiseAccount = groupwiseApp.Login("", "", mypassword, 0, _missing);

            //Create a New Appointment
            GroupwareTypeLibrary.Appointment10 appt;

            try
            {
                appt = (GroupwareTypeLibrary.Appointment10)groupwiseAccount.WorkFolder.Messages.Add(gwAppointment, egwDraft, _missing);

            }
            catch (System.Exception ex)
            {
                MessageBox.Show("Could not create Appointment item:\r\n\r\n" + ex.Message);
                return;
            }

            appt.StartDate = DateTime.Now;
            appt.EndDate = DateTime.Now.AddMinutes(30);

            appt.AlarmSet = false;
            appt.Subject.PlainText = "This is the Subject";

            string messageID = appt.MessageID.ToString();
            string RetString;

            string cmdOpenMessage = "ItemOpen(\"" + messageID + "\")";

            GroupWiseCommander.GWCommander gwc = new GroupWiseCommander.GWCommander();
            gwc.Execute(cmdOpenMessage, out RetString);

            return;

}

Select allOpen in new window

Well done! Now collect your (own) points... :-))

FYI.  Groupwise does not play well with background threads.