From 30c251e956a145104611dbe6d0b97e99bd39c056 Mon Sep 17 00:00:00 2001
From: Yorik van Havre <yorik@uncreated.net>
Date: Tue, 22 Jan 2019 00:11:11 -0200
Subject: [PATCH] Arch: Fixed multiple documents open bug in Reference object

---
 src/Mod/Arch/ArchReference.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Mod/Arch/ArchReference.py b/src/Mod/Arch/ArchReference.py
index 982daa7955..ff5edabf86 100644
--- a/src/Mod/Arch/ArchReference.py
+++ b/src/Mod/Arch/ArchReference.py
@@ -166,9 +166,9 @@ class ArchReference:
         if not os.path.exists(filename):
             # search for the file in the current directory if not found
             basename = os.path.basename(filename)
-            currentdir = os.path.dirname(FreeCAD.ActiveDocument.FileName)
+            currentdir = os.path.dirname(obj.Document.FileName)
             altfile = os.path.join(currentdir,basename)
-            if altfile == FreeCAD.ActiveDocument.FileName:
+            if altfile == obj.Document.FileName:
                 return None
             elif os.path.exists(altfile):
                 return altfile