diff --git a/eos/file_reader.py b/eos/file_reader.py
index 4c178ab..42eb38e 100644
--- a/eos/file_reader.py
+++ b/eos/file_reader.py
@@ -331,9 +331,6 @@ class AmorEventData(AmorHeader):
         Read the actual event data from file. If file is too large, find event index from packets
         that allow splitting of file smaller than self.max_events.
         """
-        if self.hdf['/entry1/Amor/detector/data/event_index'].shape[0]==0:
-            raise EOFError(f'No event packet found starting at event #{self.first_index}, '
-                           f'number of events is 0')
         packets = np.recarray(self.hdf['/entry1/Amor/detector/data/event_index'].shape, dtype=PACKET_TYPE)
         packets.start_index = self.hdf['/entry1/Amor/detector/data/event_index'][:]
         packets.time = self.hdf['/entry1/Amor/detector/data/event_time_zero'][:]
@@ -344,6 +341,9 @@ class AmorEventData(AmorHeader):
             raise EOFError(f'No event packet found starting at event #{self.first_index}, '
                            f'number of events is {self.hdf["/entry1/Amor/detector/data/event_time_offset"].shape[0]}')
         packets = packets[start_packet:]
+        if packets.shape[0]==0:
+            raise EOFError(f'No event packet found starting at event #{self.first_index}, '
+                           f'number of packets is 0')
 
         nevts = self.hdf['/entry1/Amor/detector/data/event_time_offset'].shape[0]
         if (nevts-self.first_index)>self.max_events: