diff --git a/teaser/data/dataclass.py b/teaser/data/dataclass.py
index f5dd9c269..200527198 100644
--- a/teaser/data/dataclass.py
+++ b/teaser/data/dataclass.py
@@ -130,16 +130,20 @@ def load_mat_binding(self):
 
         if version_parse is False:
             import teaser.data.bindings.v_0_4.material_bind as mat_bind
-            self.element_bind = mat_bind.MaterialTemplates()
-        if bool(version_parse.getroot().attrib) is False:
+            self.material_bind = mat_bind.MaterialTemplates()
+        elif bool(version_parse.getroot().attrib) is False:
             warnings.warn(
                 "You are using an old version of material data base XML file")
             import teaser.data.bindings.v_0_3_9.material_bind as mat_bind
+            self.material_bind = mat_bind.CreateFromDocument(
+                __xml_file_mat.read())
         elif version_parse.getroot().attrib['version'] == "0.3.9":
             warnings.warn(
                 "You are using an old version of material data base XML file")
             import teaser.data.bindings.v_0_3_9.material_bind as mat_bind
+            self.material_bind = mat_bind.CreateFromDocument(
+                __xml_file_mat.read())
         elif version_parse.getroot().attrib['version'] == "0.4":
             import teaser.data.bindings.v_0_4.material_bind as mat_bind
-
-        self.material_bind = mat_bind.CreateFromDocument(__xml_file_mat.read())
\ No newline at end of file
+            self.material_bind = mat_bind.CreateFromDocument(
+                __xml_file_mat.read())