[ptx] bug in autopano-sift refinement step?

[Rob Park]

autopano-sift gives me this error when I try to use refinement:

Unhandled Exception: System.Exception: BUG: less than three neighbours!
in <0x0036f> MultiMatch:BuildGlobalMatchList ()
in <0x000f2> MultiMatch:TwoPatchMatch
(System.Collections.ArrayList,int,int,System.Collections.ArrayList,int,int,bool)
in <0x00836> Autopano:RefineKeypoints (System.Collections.ArrayList,bool,bool)
in <0x008c8> Autopanog:OnComputeClicked (object,System.EventArgs)
in <0x00069> (wrapper delegate-invoke)
System.MulticastDelegate:invoke_void_object_EventArgs
(object,System.EventArgs)
in <0x0012d> GtkSharp.voidObjectSignal:voidObjectCallback (intptr,int)
in <0x0005a> (wrapper native-to-managed)
GtkSharp.voidObjectSignal:voidObjectCallback (intptr,int)
in (unmanaged) (wrapper managed-to-native) Gtk.Application:gtk_main ()
in <0x00004> (wrapper managed-to-native) Gtk.Application:gtk_main ()
in <0x00007> Gtk.Application:Run ()
in <0x00339> Autopanog:Main (string[])

I'm using version 2.2. not sure what the problem is.

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Urban Artography
http://artography.ath.cx