From ccca4f4421879340293763e91b3be1910034bb49 Mon Sep 17 00:00:00 2001
From: Sven Augustin <sven.augustin@psi.ch>
Date: Sun, 30 Oct 2022 21:08:23 +0100
Subject: [PATCH] added handling errors from (MathEntry) GetValue

---
 slic/gui/daqpanels/tools.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/slic/gui/daqpanels/tools.py b/slic/gui/daqpanels/tools.py
index 4cd231a1..f07632dc 100644
--- a/slic/gui/daqpanels/tools.py
+++ b/slic/gui/daqpanels/tools.py
@@ -138,7 +138,12 @@ class ETADisplay(PVDisplay):
     def update(self, _event):
         factor = 1
         for tc in self.textctrls:
-            val = tc.GetValue()
+            try:
+                val = tc.GetValue()
+            except:
+                # if any of the values is missing, cannot calculate factor
+                factor = None
+                break
             try:
                 val = int(val)
             except (ValueError, TypeError):