diff --git a/fixtracks/utils/trackingdata.py b/fixtracks/utils/trackingdata.py
index e17c658..df37168 100644
--- a/fixtracks/utils/trackingdata.py
+++ b/fixtracks/utils/trackingdata.py
@@ -38,6 +38,8 @@ class TrackingData(QObject):
         return self._data["track"].shape[0]
 
     def _find(self, ids):
+        if len(ids) < 1:
+            return np.array([])
         ids = np.sort(ids)
         indexes = np.ones_like(ids, dtype=int) * -1
         j = 0
@@ -75,8 +77,10 @@ class TrackingData(QObject):
         ids : array-like
             An array-like object containing the IDs to be set as user selections. 
         """
+        print(ids)
         self._selection = self._find(ids)
         self._selected_ids = ids
+        print(self._selection, self._selected_ids)
 
     def setTrack(self, track_id:int, setUserLabeled:bool=True)-> None:
         """Assign a new track_id to the user-selected detections
@@ -88,7 +92,8 @@ class TrackingData(QObject):
         setUserLabeled : bool
             Should the "userlabeled" state of the detections be set to True? Otherwise they will be left untouched.
         """
-        self["track"][self._user_selections] = track_id
+        print(self._selection)
+        self["track"][self._selection] = track_id
         if setUserLabeled:
             self.setUserLabeledStatus(True, True)
 
diff --git a/fixtracks/widgets/detectionview.py b/fixtracks/widgets/detectionview.py
index 05c364d..50f5202 100644
--- a/fixtracks/widgets/detectionview.py
+++ b/fixtracks/widgets/detectionview.py
@@ -136,7 +136,8 @@ class DetectionView(QWidget):
         coordinates = self._data.coordinates(selection=True)
         centercoordinates = self._data.centerOfGravity(selection=True)
         userlabeled = self._data.selectedData("userlabeled")
-        indices = self._data.selectedData("index")
+       
+        indices = self._data.selectionIndices
         image_rect = self._pixmapitem.boundingRect() if self._pixmapitem is not None else QRectF(0,0,0,0)
 
         for i, idx in enumerate(indices):
diff --git a/fixtracks/widgets/tracks.py b/fixtracks/widgets/tracks.py
index 8944959..b26d129 100644
--- a/fixtracks/widgets/tracks.py
+++ b/fixtracks/widgets/tracks.py
@@ -307,6 +307,7 @@ class FixTracks(QWidget):
 
     def on_detectionsSelected(self, detections):
         logging.debug("Tracks: Detections selected")
+        print(detections)
         tracks = np.zeros(len(detections), dtype=int)
         ids = np.zeros_like(tracks)
         frames = np.zeros_like(tracks)