Comment 3 for bug 162575

I got the same error, from an invocation of autopano-sift by Hugin.

In the package autopano-sift (2.4-0ubuntu8), the executable is called autopano. Using the default settings, Hugin (0.7.0~svn3191+beta5-1ubuntu1) expects it to be called autopano-sift. After changing Hugin's preferences, it calls:

autopano --maxmatches 20 /tmp/ap_resjyB4Iq "/home/sybren/2008/20080926-Utrecht/hdr1/jpeg/hdr1-1.jpg" "/home/sybren/2008/20080926-Utrecht/hdr1/jpeg/hdr1-2.jpg" "/home/sybren/2008/20080926-Utrecht/hdr1/jpeg/hdr1-3.jpg" "/home/sybren/2008/20080926-Utrecht/hdr1/jpeg/hdr1-4.jpg" "/home/sybren/2008/20080926-Utrecht/hdr1/jpeg/hdr1-5.jpg" "/home/sybren/2008/20080926-Utrecht/hdr1/jpeg/hdr1-6.jpg" "/home/sybren/2008/20080926-Utrecht/hdr1/jpeg/hdr1-7.jpg"

The program output reads:

autopano-sift, Automatic panorama generation program

Loading keyfiles
ex: System.Xml.XmlException: Text node cannot appear in this state. Line 1, position 1.
  at System.Xml.XmlTextReader.ReadText (Boolean notWhitespace) [0x00000]
  at System.Xml.XmlTextReader.ReadContent () [0x00000]
  at System.Xml.XmlTextReader.Read () [0x00000]
  at System.Xml.XmlReader.MoveToContent () [0x00000]
  at System.Xml.Serialization.XmlSerializationReaderInterpreter.ReadRoot () [0x00000]
  at System.Xml.Serialization.XmlSerializer.Deserialize (System.Xml.Serialization.XmlSerializationReader reader) [0x00000]

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object
  at MultiMatch.LoadKeysets (System.String[] filenames) [0x00000]
  at Autopano.Main (System.String[] args) [0x00000]

I would expect the default Hugin preferences to simply work with the Ubuntu packages.