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https://issues.apache.org/jira/browse/TINKERPOP-1893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16370510#comment-16370510
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stephen mallette commented on TINKERPOP-1893:
---------------------------------------------

It took some research but there was an insanely bad bug in 3.2.5/3.3.0 where 
"reference" elements didn't have their labels being set. I think it was 
overlooked because we were still defaulting to "detached" elements at the time, 
but when "reference" elements went mainstream the problem was realized. The fix 
came in 3.2.7/3.3.1 - you can see the note in the 3.2.7 changelog:

https://github.com/apache/tinkerpop/blob/master/CHANGELOG.asciidoc#tinkerpop-327-release-date-december-17-2017

> ReferenceVertex was missing its label() string. ReferenceElement now supports 
> all label handling.

Just upgrade the server from 3.3.0 and i think it should work.

> AddV(string label) does not add label
> -------------------------------------
>
>                 Key: TINKERPOP-1893
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-1893
>             Project: TinkerPop
>          Issue Type: Bug
>          Components: dotnet
>    Affects Versions: 3.2.7, 3.3.1
>         Environment: Windows, IIS, docker
>            Reporter: Klaus Stephan
>            Assignee: Florian Hockmann
>            Priority: Major
>         Attachments: image-2018-02-19-15-45-22-135.png, 
> image-2018-02-19-15-45-33-986.png, image-2018-02-19-15-45-46-671.png
>
>
> public GraphTraversal<Vertex, Vertex> AddV(string label) does not add a label 
> to the vertex.
> Can someone please check this?
> Is there a workaround to set the label until the next build? (I am fairly new 
> to gremlin)
> I tried this on 3.3.2-rc1 and 3.2.8-rc1 (the majors don't work for me because 
> of TINKERPOP-1880)
> I use [https://hub.docker.com/r/bricaud/gremlin-server/] for testing.



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