Cannot get vds.summarize to work

[flands]

I have tried this targeting vCenter Server and ESXi (both 5.1):

10.16.28.66/datacenter/networks/vds> vds.summarize /10.16.28.66/datacenter/networks/vds
Request:
<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">env:Body<_this type="PropertyCollector">propertyCollector</_this>ManagedEntitynamegroup-d11FolderchildEntity/env:Body/env:Envelope

Response (in 0.132 s)

<soapenv:Envelope xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
soapenv:Body
datacenter-2namedatacenter
/soapenv:Body
/soapenv:Envelope

Request:
<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">env:Body<_this type="PropertyCollector">propertyCollector</_this>DatacentervmFolderdatastoreFoldernetworkFolderhostFolderdatacenter-2/env:Body/env:Envelope

Response (in 0.136 s)

<soapenv:Envelope xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
soapenv:Body
datacenter-2datastoreFoldergroup-s5hostFoldergroup-h4networkFoldergroup-n6vmFoldergroup-v3
/soapenv:Body
/soapenv:Envelope

Request:
<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">env:Body<_this type="SearchIndex">SearchIndex</_this>group-n6vds/env:Body/env:Envelope

Response (in 0.213 s)

<soapenv:Envelope xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
soapenv:Body
dvs-26
/soapenv:Body
/soapenv:Envelope

NoMethodError: undefined method table' for VmwareDistributedVirtualSwitch("dvs-26"):RbVmomi::VIM::VmwareDistributedVirtualSwitch /Users/flands/.rvm/gems/ruby-1.9.3-p362/gems/rvc-1.7.0/lib/rvc/extensions/DistributedVirtualSwitch.rb:98:insummarize'
/Users/flands/.rvm/gems/ruby-1.9.3-p362/gems/rvc-1.7.0/lib/rvc/modules/vds.rb:35:in summarize' /Users/flands/.rvm/gems/ruby-1.9.3-p362/gems/rvc-1.7.0/lib/rvc/command.rb:42:ininvoke'
/Users/flands/.rvm/gems/ruby-1.9.3-p362/gems/rvc-1.7.0/lib/rvc/shell.rb:126:in eval_command' /Users/flands/.rvm/gems/ruby-1.9.3-p362/gems/rvc-1.7.0/lib/rvc/shell.rb:73:ineval_input'
/Users/flands/.rvm/gems/ruby-1.9.3-p362/gems/rvc-1.7.0/bin/rvc:160:in <top (required)>' /Users/flands/.rvm/gems/ruby-1.9.3-p362/bin/rvc:19:inload'
/Users/flands/.rvm/gems/ruby-1.9.3-p362/bin/rvc:19:in <main>' /Users/flands/.rvm/gems/ruby-1.9.3-p362/bin/ruby_noexec_wrapper:14:ineval'
/Users/flands/.rvm/gems/ruby-1.9.3-p362/bin/ruby_noexec_wrapper:14:in `

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