Raise error when could not connect

__init__.py

@@ -46,17 +46,26 @@ class telescope():
 
         self._outsocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         if self.setmode == 'J2000':
-            self._outsocket.connect((consoleHost,
+            try:
+                self._outsocket.connect((consoleHost,
                                     config.getint('Console','Port_Write_J2000')))
+            except socket.gaierror as e:
+                raise IOError("Could not connect to DT J2000 port: " + str(e))
         elif self.setmode == 'AZEL':
-            self._outsocket.connect((consoleHost,
+            try:
+                self._outsocket.connect((consoleHost,
                                     config.getint('Console','Port_Write_AzEl')))
+            except socket.gaierror as e:
+                raise IOError("Could not connect to DT AZEL port: " + str(e))
 
         # Initialize offset socket for all modes where output is desired
         if self.setmode is not None:
             self._offsetsocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-            self._offsetsocket.connect((consoleHost,
+            try:
+                self._offsetsocket.connect((consoleHost,
                                        config.getint('Console','Port_Write_Offset')))
+            except socket.gaierror as e:
+                raise IOError("Could not connect to DT Offset port: " + str(e))
 
         self._event_j2000 = threading.Event()
         thread_read_j2000 = threading.Thread(target=self._readj2000, args=(