Import errors corrected

navipy/scripts/blend_alongtraj.py

@@ -9,13 +9,13 @@ import tempfile
 from navipy.scripts import parser_logger, args_to_logparam
 # Following need to be imported in blender as well
 from navipy.sensors.renderer import BlenderRender
-from navipy.tools.trajectory import Trajectory
+from navipy.trajectories import Trajectory
 from navipy import logger
 
 
 importwithinblender = [
     'from navipy.sensors.renderer import BlenderRender',
-    'from navipy.tools.trajectory import Trajectory',
+    'from navipy.trajectories import Trajectory',
     'from navipy import logger']
 
 

navipy/sensors/renderer.py

@@ -59,7 +59,8 @@ class AbstractRender():
             self._logger.exception(msg)
             raise TypeError(msg)
         if not isinstance(trajectory, Trajectory):
-            msg = 'trajectory should be navipy Trajectory'
+            msg = 'trajectory should be {}'.format(Trajectory)
+            msg += 'and not {}'.format(type(trajectory))
             self._logger.exception(msg)
             raise TypeError(msg)
         # Create the directory name if it does