diff --git a/.flake8 b/.flake8
index d497808..c9d4a00 100644
--- a/.flake8
+++ b/.flake8
@@ -1,4 +1,17 @@
 [flake8]
 max-line-length=99
-ignore = E121, E123, E126, E133, E226, E241, E242, E402, E704, W503, W504, W505 and W605
+ignore =
+    E121,
+    E123,
+    E126,
+    E133,
+    E226,
+    E241,
+    E242,
+    E402,
+    E704,
+    W503,
+    W504,
+    W505,
+    W605
 exclude = docs,build,dist
\ No newline at end of file
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) \