convert.rb

# This runs:
escaped_out = "/var/folders/h3/286_8q714zzbrsyt55xjqyn00000gn/T/d20160705-68336-ib6zho"
escaped_doc = "/var/folders/h3/286_8q714zzbrsyt55xjqyn00000gn/T/small_analytic.xls20160705-68336-1fuvhtn.xls"
office_executable = '/Applications/LibreOffice.app/Contents/MacOS/soffice'
options = "--headless --invisible --norestore --nolockcheck --convert-to csv:\"Text - txt - csv (StarCalc)\" --outdir #{escaped_out} #{escaped_doc}"
cmd = "#{office_executable} #{options}" 

result, error, pid = Open3.capture3(custom_env, cmd)

# This fails:
options = [
  '--headless',
  '--invisible',
  '--norestore',
  '--nolockcheck',
  '--convert-to', 'csv:Text - txt - csv (StarCalc)',
  '--outdir', escaped_out,
  escaped_doc,
]

result, error, pid = Open3.capture3(custom_env, office_executable, *options)