diff --git a/plugins/VersionUpgrade/VersionUpgrade21to22/MachineInstance.py b/plugins/VersionUpgrade/VersionUpgrade21to22/MachineInstance.py
index 2291adf92b..1a6f7b9da9 100644
--- a/plugins/VersionUpgrade/VersionUpgrade21to22/MachineInstance.py
+++ b/plugins/VersionUpgrade/VersionUpgrade21to22/MachineInstance.py
@@ -13,7 +13,10 @@ import io #To write config files to strings as if they were files.
 #   \return A machine instance instance, or None if the file format is
 #   incorrect.
 def importVersion1(serialised):
-    return MachineInstance(serialised)
+    try:
+        return MachineInstance(serialised)
+    except configparser.Error, SettingsError.InvalidFormatError, SettingsError.InvalidVersionError:
+        return None
 
 ##  A representation of a machine instance used as intermediary form for
 #   conversion from one format to the other.
diff --git a/plugins/VersionUpgrade/VersionUpgrade21to22/Profile.py b/plugins/VersionUpgrade/VersionUpgrade21to22/Profile.py
index 8fd48745b1..52180b72e0 100644
--- a/plugins/VersionUpgrade/VersionUpgrade21to22/Profile.py
+++ b/plugins/VersionUpgrade/VersionUpgrade21to22/Profile.py
@@ -12,7 +12,10 @@ import io #To write config files to strings as if they were files.
 #   \param serialised The serialised form of a profile in version 1.
 #   \return A profile instance, or None if the file format is incorrect.
 def importVersion1(serialised):
-    return Profile(serialised)
+    try:
+        return Profile(serialised)
+    except configparser.Error, SettingsError.InvalidFormatError, SettingsError.InvalidVersionError:
+        return None
 
 ##  A representation of a profile used as intermediary form for conversion from
 #   one format to the other.