HDF4Error was undefined, needed module

da/tools/io4.py

@@ -361,7 +361,7 @@ class CT_HDF(hdf.SD):
             #print 'Reading from file'
 	    try:
             	super(CT_HDF,self).__init__(filename) 
-	    except HDF4Error: 
+	    except hdf.HDF4Error: 
                 msg = 'Requested file not found for opening: %s'%filename ; logging.error(msg)
                 msg = "Exiting" ; logging.info(msg)
                 sys.exit(2)