Server stack trace: 
at System.Threading.Thread.StartupSetApartmentStateInternal() 
at System.Threading.Thread.Start(StackCrawlMark& stackMark) 
at System.Threading.Thread.Start() 
at Elevate.ElevateDB.Data.Engine.TEDBThread.Start() 
at Elevate.ElevateDB.Data.Engine.TEDBThreadTimer.UpdateTimer() 
at Elevate.ElevateDB.Data.Engine.TEDBRemoteSessionManager.StartPinging() 
at Elevate.ElevateDB.Data.Engine.TEDBRemoteSessionManager.Login(String UserName, String Password) 
at Elevate.ElevateDB.Data.Engine.TEDBConnectionManager.Connect() 
at Elevate.ElevateDB.Data.EDBConnection.Open() 
at ClinicOffice.cEDBHelper.GetDatabasesAndPaths(String ConnectionStr) 
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My code which triggers this is the first point at which my app opens a connection to the EDB Server, as follows :-

=======================================
   static public Dictionary<string, string> GetDatabasesAndPaths(string ConnectionStr)
   {
     Dictionary<string, string> dic = new Dictionary<string, string>();
     using (EDBConnection con = new EDBConnection(ConnectionStr))
     {
       DataTable tbl = new DataTable();
       con.Open();
       using (EDBDataAdapter adap = new EDBDataAdapter("select * from databases order by name", con))
       {
         adap.Fill(tbl);
       } 

       foreach (DataRow row in tbl.Rows)
         dic.Add(row["Name"].ToString(), row["Path"].ToString());
     }
     return dic;
   }