From 25157151935bb8180378ca4e9cf9fda57101c2b0 Mon Sep 17 00:00:00 2001
From: Sebastian Wehling-Benatelli <sebastian.wehling@rub.de>
Date: Tue, 23 Jul 2024 13:42:45 +0200
Subject: [PATCH] bugfix: corrected for ValueError

---
 PyLoT.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/PyLoT.py b/PyLoT.py
index 5ba6ec0f..7981e7c9 100755
--- a/PyLoT.py
+++ b/PyLoT.py
@@ -1408,7 +1408,10 @@ class MainWindow(QMainWindow):
         eventBox.setView(tv)
 
     def get_max_path_length(self):
-        return max(len(event.path) for event in self.project.eventlist)
+        if self.project.eventlist:
+            return max(len(event.path) for event in self.project.eventlist)
+        else:
+            return None
 
     def collect_event_data(self, event, plmax):
         data = {