Consider the following script: I want to pass nil to 'eventId' instead of 0.
But ruby spits out error if i try to use nil. It works for 0.

soap     = SOAP::WSDLDriverFactory.new(wsdl_url).create_rpc_driver
  soap.wiredump_file_base = "soapresult"

  parameterMap = { "versionSetName" => "live",
                   "eventId"        => 0,
                 }


  print "\nCAlling getVersionSet...\n"
  result = soap.getVersionSetFile(parameterMap)


Thank you,
Raja