diff --git a/pylot/core/util/dataprocessing.py b/pylot/core/util/dataprocessing.py
index 3796fdda..e6093435 100644
--- a/pylot/core/util/dataprocessing.py
+++ b/pylot/core/util/dataprocessing.py
@@ -92,7 +92,10 @@ class Metadata(object):
                 del(self.seed_ids[seed_id])
 
 
-    def get_metadata(self, seed_id, time):
+    def get_metadata(self, seed_id, time=None):
+        # try most recent data if no time is specified
+        if not time:
+            time = UTCDateTime()
         # get metadata for a specific seed_id, if not already read, try to read from inventories
         if not seed_id in self.seed_ids.keys():
             self._read_inventory_data(seed_id)
@@ -128,14 +131,12 @@ class Metadata(object):
 
 
     def read_single_file(self, inv_fname):
-        # try to read a single file as Parser/Inventory if it was not already read before
-        if not inv_fname in self.inventory_files.keys():
-            pass
-        else:
-            if not self.inventory_files[inv_fname]:
-                pass
-            else:
-                return
+        # try to read a single file as Parser/Inventory
+
+        # return if it was read already
+        if self.inventory_files.get(inv_fname, None):
+            return
+
         try:
             invtype, robj = self._read_metadata_file(inv_fname)
             if robj == None:
@@ -148,7 +149,10 @@ class Metadata(object):
         return True
 
 
-    def get_coordinates(self, seed_id, time):
+    def get_coordinates(self, seed_id, time=None):
+        # try most recent data if no time is specified
+        if not time:
+            time = UTCDateTime()
         metadata = self.get_metadata(seed_id, time)
         if not metadata:
             return
@@ -473,7 +477,7 @@ def restitute_trace(input_tuple):
 
     seed_id = tr.get_id()
 
-    mdata = metadata.get_metadata(seed_id)
+    mdata = metadata.get_metadata(seed_id, time=tr.stats.starttime)
     if not mdata:
         return no_metadata(tr, seed_id)
 
diff --git a/tests/test_Metadata/test_Metadata.py b/tests/test_Metadata/test_Metadata.py
index 3d8b770e..271bf4a9 100644
--- a/tests/test_Metadata/test_Metadata.py
+++ b/tests/test_Metadata/test_Metadata.py
@@ -23,6 +23,18 @@ class TestMetadata(unittest.TestCase):
             result[channel] = coords
             self.assertDictEqual(result[channel], expected[channel])
 
+    def test_get_coordinates_sucess_no_time(self):
+        expected = {'Z': {u'elevation': 607.0, u'longitude': 12.87571, u'local_depth': 0.0, u'azimuth': 0.0, u'latitude': 49.14502, u'dip': -90.0},
+                    'E': {u'azimuth': 90.0, u'dip': 0.0, u'elevation': 607.0, u'latitude': 49.14502, u'local_depth': 0.0, u'longitude': 12.87571},
+                    'N': {u'azimuth': 0.0, u'dip': 0.0, u'elevation': 607.0, u'latitude': 49.14502, u'local_depth': 0.0, u'longitude': 12.87571}
+                    }
+        result = {}
+        for channel in ('Z', 'N', 'E'):
+            coords = self.m.get_coordinates(self.station_id+channel)
+            result[channel] = coords
+            self.assertDictEqual(result[channel], expected[channel])
+
+
 class TestMetadataAdding(unittest.TestCase):
     """Tests if adding files and directories to a metadata object works."""