mspire doesn't read mzML file

[akchan]

Hi. When I read a sample mzML file 'tiny1.mzML1.1.0.mzML' distributed at the PSI site, mspire raise NoMethodError.

Snippet:

require 'open-uri'
require 'mzml'

url = 'http://proteowizard.sourceforge.net/example_data/tiny.pwiz.1.1.mzML'

Mspire::Mzml.open(open(url)) do |mzml|
  spectrum = mzml[0]
end

It seems a bug around Mspire::Mzml::Contact class. But I couldn't specify the exact cause. Can anyone fix it?