From 3afbf42791681fd437cd58616ff3bb43ee792206 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20K=C3=A4berich?= <j.kaeberich@gmx.de>
Date: Sat, 29 Jan 2022 15:10:38 +0100
Subject: [PATCH] Fix: prevent crash when closing preferences without connected
 device

---
 Software/PC_Application/appwindow.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Software/PC_Application/appwindow.cpp b/Software/PC_Application/appwindow.cpp
index 4161e04..845584c 100644
--- a/Software/PC_Application/appwindow.cpp
+++ b/Software/PC_Application/appwindow.cpp
@@ -227,7 +227,9 @@ AppWindow::AppWindow(QWidget *parent)
         // acquisition frequencies may have changed, update
         UpdateAcquisitionFrequencies();
 
-        active->initializeDevice();
+        if(device) {
+            active->initializeDevice();
+        }
     });
 
     connect(ui->actionAbout, &QAction::triggered, [=](){