diff --git a/asn1_value_editor/standalone_editor.py b/asn1_value_editor/standalone_editor.py
index 10c3f2e4b00dbb6cdc61373f1994c834bcb0cbb9..d2a0c92c774c9defc617a7cb5f9ae2660c45d449 100755
--- a/asn1_value_editor/standalone_editor.py
+++ b/asn1_value_editor/standalone_editor.py
@@ -14,7 +14,7 @@
 
     This version needs ASN.1 version 3.x.x
 
-    Copyright (c) 2012-2015 European Space Agency
+    Copyright (c) 2012-2017 European Space Agency
 
     Designed and implemented by Maxime Perrotin
 
@@ -242,7 +242,14 @@ class SingleValueEditor(QObject):
         self.widgets[name] = {'widget': loader.load(uiFile)}
         uiFile.close()
         widget = self.widgets[name]['widget']
-        pyType = self.tc[name.replace('_', '-')]
+        for tc in self.tc.iterkeys():
+            if tc.lower().replace('_', '-') == name.lower().replace('_', '-'):
+                tcNameWithCase = tc
+                break
+        else:
+            raise TypeError ("No type named {} is defined in the ASN.1 model"
+                             .format(name))
+        pyType = self.tc[tcNameWithCase]
         self.widgets[name]['editor'] = widget.findChild(asn1Editor, 'ASN1EDITOR')
         self.widgets[name]['editor'].log = logger
         okButton = widget.findChild(QToolButton, 'okButton')
@@ -266,6 +273,7 @@ class SingleValueEditor(QObject):
 
         widget = self.widgets[param]
         # Create a ctypes instance of the variable and set it to the editor
+        #  print dir(self.asn1ctypes), self.asn1ctypes.__file__
         instance = getattr(self.asn1ctypes, asnType.replace('-', '_'))()
         widget['editor'].asn1Instance = instance
         logger.info('Created instance of ' + asnType)