diff --git a/pyEvalData/io/source.py b/pyEvalData/io/source.py
index fec7933..34de9d3 100644
--- a/pyEvalData/io/source.py
+++ b/pyEvalData/io/source.py
@@ -547,7 +547,7 @@ def save_all_scans_to_nexus(self):
             try:
                 _ = nxs_file[entry_name]
                 scan_in_nexus = True
-            except KeyError:
+            except (KeyError, nxs.NeXusError):
                 scan_in_nexus = False
 
             if (not scan_in_nexus) or (scan.number >= last_scan_in_nexus) \