Handle invalid setpoints, fix typo in exception

__init__.py

@@ -2,7 +2,7 @@ from __future__ import print_function
 
 import socket
 import logging
-from astropy.coordinates import SkyCoord, AltAz
+from astropy.coordinates import SkyCoord, AltAz, RangeError
 from astropy import units as u
 from configparser import ConfigParser
 import os.path
@@ -23,7 +23,7 @@ class telescope():
         'J2000' or 'AZEL'.
         '''
         if setmode not in ('J2000', 'AZEL', None):
-            raise ValueError("Mode must be None, 'J2000' or 'AZEL', not " + mode)
+            raise ValueError("Mode must be None, 'J2000' or 'AZEL', not " + setmode)
         self.setmode = setmode
 
         if consoleHost is None:
@@ -101,7 +101,11 @@ class telescope():
             (ra, dec) = (vals[2], vals[3])
             self.radec = SkyCoord(ra, dec, frame='icrs')
             (setpoint_ra, setpoint_dec) = (vals[0], vals[1])
-            self.setpoint_radec = SkyCoord(setpoint_ra, setpoint_dec, frame='icrs')
+            try:
+                # The setpoint can be invalid
+                self.setpoint_radec = SkyCoord(setpoint_ra, setpoint_dec, frame='icrs')
+            except RangeError:
+                self.setpoint_radec = None
             self._event_j2000.set()
 
     def _readtraces(self, tracehost, traceport):