diff --git a/src/Mod/Arch/importOBJ.py b/src/Mod/Arch/importOBJ.py
index c5efb49550..d217dc7de8 100644
--- a/src/Mod/Arch/importOBJ.py
+++ b/src/Mod/Arch/importOBJ.py
@@ -195,7 +195,7 @@ def export(exportList,filename):
     outfile.close()
     FreeCAD.Console.PrintMessage(translate("Arch","Successfully written") + " " + decode(filename) + "\n")
     if materials: 
-        outfile = pythonopen(filenamemtl,"wb")
+        outfile = pythonopen(filenamemtl,"w")
         outfile.write("# FreeCAD v" + ver[0] + "." + ver[1] + " build" + ver[2] + " Arch module\n")
         outfile.write("# http://www.freecadweb.org\n")
         kinds = {"AmbientColor":"Ka ","DiffuseColor":"Kd ","SpecularColor":"Ks ","EmissiveColor":"Ke ","Transparency":"d "}
@@ -219,23 +219,23 @@ def export(exportList,filename):
         FreeCAD.Console.PrintMessage(translate("Arch","Successfully written") + ' ' + decode(filenamemtl) + "\n")
 
 
-def decode(name):
-    "decodes encoded strings"
-    try:
-        decodedName = (name.decode("utf8"))
-    except UnicodeDecodeError:
-        try:
-            decodedName = (name.decode("latin1"))
-        except UnicodeDecodeError:
-            FreeCAD.Console.PrintError(translate("Arch","Error: Couldn't determine character encoding"))
-            decodedName = name
-    return decodedName
+#def decode(name):
+#    "decodes encoded strings"
+#    try:
+#        decodedName = (name.decode("utf8"))
+#    except UnicodeDecodeError:
+#        try:
+#            decodedName = (name.decode("latin1"))
+#        except UnicodeDecodeError:
+#            FreeCAD.Console.PrintError(translate("Arch","Error: Couldn't determine character encoding"))
+#            decodedName = name
+#    return decodedName
 
 def open(filename):
     "called when freecad wants to open a file"
-    docname = (os.path.splitext(os.path.basename(filename))[0]).encode("utf8")
-    doc = FreeCAD.newDocument(docname)
-    doc.Label = decode(docname)
+    docname = (os.path.splitext(os.path.basename(filename))[0])
+    doc = FreeCAD.newDocument(docname.encode("utf8"))
+    doc.Label = docname
     return insert(filename,doc.Name)
 
 def insert(filename,docname):
@@ -246,7 +246,7 @@ def insert(filename,docname):
         doc = FreeCAD.newDocument(docname)
     FreeCAD.ActiveDocument = doc
 
-    with pythonopen(filename,"rb") as infile:
+    with pythonopen(filename,"r") as infile:
         verts = []
         facets = []
         activeobject = None
@@ -257,7 +257,7 @@ def insert(filename,docname):
             if line[:7] == "mtllib ":
                 matlib = os.path.join(os.path.dirname(filename),line[7:])
                 if os.path.exists(matlib):
-                    with pythonopen(matlib,"rb") as matfile:
+                    with pythonopen(matlib,"r") as matfile:
                         mname = None
                         color = None
                         trans = None