Check if data directory exists to avoid program abortion.

PyLoT.py

@@ -3807,6 +3807,7 @@ class Project(object):
                 datapaths.append(event.datapath)
         for datapath in datapaths:
             datapath = os.path.join(self.rootpath, datapath)
+            if os.path.isdir(datapath):
                 for filename in os.listdir(datapath):
                     filename = os.path.join(datapath, filename)
                     if os.path.isfile(filename) and filename.endswith(fext):
@@ -3814,6 +3815,8 @@ class Project(object):
                             self.read_eventfile_info(filename)
                         except Exception as e:
                             print('Failed on reading eventfile info from file {}: {}'.format(filename, e))
+            else:
+                print("Directory %s does not exist!" % datapath)
 
     def getPaths(self):
         '''