From da45328f6f9b35cbbdc7167d7faadb6a07634bdb Mon Sep 17 00:00:00 2001
From: Yorik van Havre <yorik@uncreated.net>
Date: Tue, 3 Dec 2024 15:30:03 +0100
Subject: [PATCH] BIM: Fixed lock button with no doc - Fixes #18191

---
 src/Mod/BIM/nativeifc/ifc_status.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Mod/BIM/nativeifc/ifc_status.py b/src/Mod/BIM/nativeifc/ifc_status.py
index fc4ad5a68cec..ec2a1f8ce2fc 100644
--- a/src/Mod/BIM/nativeifc/ifc_status.py
+++ b/src/Mod/BIM/nativeifc/ifc_status.py
@@ -327,6 +327,8 @@ def unlock_document():
     from nativeifc import ifc_tools  # lazy loading
 
     doc = FreeCAD.ActiveDocument
+    if not doc:
+        return
     if "IfcFilePath" in doc.PropertiesList:
         # this is a locked document
         doc.openTransaction("Unlock document")
@@ -356,6 +358,8 @@ def lock_document():
     from PySide import QtCore
 
     doc = FreeCAD.ActiveDocument
+    if not doc:
+        return
     products = []
     spatial = []
     ifcfile = None