diff --git a/openlp/core/lib/ui.py b/openlp/core/lib/ui.py
index 41e88b54b..5d1b722c5 100644
--- a/openlp/core/lib/ui.py
+++ b/openlp/core/lib/ui.py
@@ -122,7 +122,7 @@ def critical_error_message_box(title=None, message=None, parent=None,
         Should this message box question the user.
     """
     if question:
-        return QtGui.QMessageBox.critical(parent, error, message,
+        return QtGui.QMessageBox.critical(parent, UiStrings.Error, message,
             QtGui.QMessageBox.StandardButtons(
             QtGui.QMessageBox.Yes | QtGui.QMessageBox.No))
     data = {u'message': message}
diff --git a/openlp/plugins/presentations/lib/impresscontroller.py b/openlp/plugins/presentations/lib/impresscontroller.py
index 79e7d0ea8..7de095d54 100644
--- a/openlp/plugins/presentations/lib/impresscontroller.py
+++ b/openlp/plugins/presentations/lib/impresscontroller.py
@@ -429,7 +429,7 @@ class ImpressDocument(PresentationDocument):
         ``slide_no``
             The slide the text is required for, starting at 1
         """
-        return __get_text_from_slide(slide_no)
+        return self.__get_text_from_page(slide_no)
 
     def get_slide_notes(self, slide_no):
         """
@@ -438,7 +438,7 @@ class ImpressDocument(PresentationDocument):
         ``slide_no``
             The slide the notes are required for, starting at 1
         """
-        return __get_text_from_page(slide_no, True)
+        return self.__get_text_from_page(slide_no, True)
 
     def __get_text_from_page(self, slide_no, notes=False):
         """