From a66c9ee5496f83b33ea1e200d4b1708bb2bc63f3 Mon Sep 17 00:00:00 2001
From: Roy-043 <70520633+Roy-043@users.noreply.github.com>
Date: Wed, 30 Aug 2023 18:10:13 +0200
Subject: [PATCH] Draft: importDWG.py wrongly assumed that opt directory always
 exists on Linux (#10447)

Forum topic:
https://forum.freecad.org/viewtopic.php?p=703063#p703061
---
 src/Mod/Draft/importDWG.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/Mod/Draft/importDWG.py b/src/Mod/Draft/importDWG.py
index a33b0e3963..fa34253b37 100644
--- a/src/Mod/Draft/importDWG.py
+++ b/src/Mod/Draft/importDWG.py
@@ -244,10 +244,11 @@ def get_qcad_converter():
     elif platform.system() == "Linux":
         # /home/$USER/opt/qcad-3.28.1-trial-linux-qt5.14-x86_64/dwg2dwg
         path = os.path.expandvars("/home/$USER/opt")
-        for sub in os.listdir(path):
-            if "qcad" in sub:
-                path = path + "/" + sub + "/" + "dwg2dwg"
-                break
+        if os.path.exists(path) and os.path.isdir(path):
+            for sub in os.listdir(path):
+                if "qcad" in sub:
+                    path = path + "/" + sub + "/" + "dwg2dwg"
+                    break
     else: # for macOS
         path = "/Applications/QCAD.app/Contents/Resources/dwg2dwg"