From cd91fae0c23cfd80368307c3ceddc25c6e6280b3 Mon Sep 17 00:00:00 2001
From: Sven Augustin <sven.augustin@psi.ch>
Date: Fri, 28 Apr 2023 21:38:22 +0200
Subject: [PATCH] catch empty or wrong start, stop, step

---
 slic/gui/widgets/entries.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/slic/gui/widgets/entries.py b/slic/gui/widgets/entries.py
index 9ca44e8b..c8d2b214 100644
--- a/slic/gui/widgets/entries.py
+++ b/slic/gui/widgets/entries.py
@@ -52,6 +52,8 @@ class StepsRangeEntry(wx.BoxSizer):
             else:
                 if step_size == 0:
                     raise ValueError
+                if None in (start_pos, end_pos, step_size):
+                    raise ValueError
         except ValueError:
             nsteps = ""
             tooltip = "Start, Stop and Step Size need to be floats.\nStep Size cannot be zero."