diff --git a/python/tmc_classes.py b/python/tmc_classes.py
index ce706a4..74e07b3 100644
--- a/python/tmc_classes.py
+++ b/python/tmc_classes.py
@@ -80,7 +80,7 @@ class lcl:
         if self.poffsets.has_key(LCD):
             return self.poffsets[LCD]
         else:
-            return ""
+            return None
     def get_segment(self,LCD):
         return self.segments[LCD]
     def get_road(self,LCD):
@@ -353,8 +353,9 @@ class tmc_location:
                   self.linRef=tmc_segment(int(self.point.ROA_LCD),tableobj)
               if not self.point.POL_LCD==u"":   
                   self.reflocs=self.__ref_locs(int(self.point.POL_LCD),self.first_name.encode('utf-8'))
-              self.negative_offset=self.lcl_obj.get_poffsets(lcn).NEG_OFF_LCD
-              self.positive_offset=self.lcl_obj.get_poffsets(lcn).POS_OFF_LCD
+              self.poffsets=self.lcl_obj.get_poffsets(lcn)
+              #self.negative_offset=self.lcl_obj.get_poffsets(lcn).NEG_OFF_LCD
+              #self.positive_offset=self.lcl_obj.get_poffsets(lcn).POS_OFF_LCD
               try:
                   #koords stored in WGS84 format with decimal degrees multiplied with 10^5
                   self.xkoord=int(self.point.XCOORD)/100000.0
@@ -383,10 +384,10 @@ class tmc_location:
         elif self.tableobj.log or self.tableobj.debug:
           print("lcn not allocated  %i"%lcn)
     def get_extent_location(self,loc,extent,direction): #direction: 0:pos, 1:neg
-        if extent==0 or not loc.is_valid:
+        if extent==0 or not loc.is_valid or loc.poffsets==None:
             return loc
         else:
-            offset=loc.positive_offset if direction==0 else loc.negative_offset
+            offset=loc.poffsets.POS_OFF_LCD if direction==0 else loc.poffsets.NEG_OFF_LCD
             if offset=="":
                 return loc
             else: