Slicer + Plus Server Connection Error

Support
1

Hi,
I am attempting to obtain the appropriate transforms for a configuration of NDI markers. I am using the Polaris Vega VT camera, and the Plus Remote module on Slicer. When I launch the Plus server individually, the connection works. But once I launch the Plus Remote module and link the server, I get the following error.

Failed to create IMAGE message - unable to pack image message

IMG_3034
IMG_30341920×1440 731 KB

2

Hi, it’s interesting that IMAGE message occurs in your log. If you are only using a position tracker and no imaging device (e.g. ultrasound), then PLUS should not try to create an IMAGE message. Do you want to post the contents of your PLUS config file here?

3

Yeah, the contents are attached in the below file.

<PlusConfiguration version="2.1">

  <DataCollection StartupDelaySec="1.0" >
    <DeviceSet
      Name="PlusServer: NDI Vega tracker with passive markers"
      Description="Broadcasting tool tracking data through OpenIGTLink
For NDI Vega: Tool (8700339), Stylus (8700340), Reference (8700449)" />
    <Device
      Id="TrackerDevice"
      Type="NDITracker"
      NetworkHostname="P9-13119"
      NetworkPort="8765"
      ToolReferenceFrame="Reference" >
      <DataSources>
        <DataSource Type="Tool" Id="Stylus" RomFile="NdiToolDefinitions/8700340.rom"  />
      </DataSources>
      <OutputChannels>
        <OutputChannel Id="TrackerStream" >
          <DataSource Id="Stylus"/>
        </OutputChannel>
      </OutputChannels>
    </Device>


    <Device
      Id="TrackedVideoDevice"
      Type="VirtualMixer" >
      <InputChannels>
        <InputChannel Id="TrackerStream" />
      </InputChannels>
      <OutputChannels>
        <OutputChannel Id="TrackedVideoStream"/>
      </OutputChannels>
    </Device>
  </DataCollection>

  <CoordinateDefinitions>
    <Transform From="Image" To="Reference"
      Matrix="
        1	0	0 0
        0 1 0 0
        0 0 1 0
        0 0 0 1"
       Error="0.554951" Date="012617_105449" />
    <Transform From="StylusTip" To="Stylus"
      Matrix="
        1	0	0.000203823	0.0180449
        3.31529e-09	-1	-1.62655e-05	-0.00144002
        0.000203823	1.62655e-05	-1	-88.5321
        0	0	0	1"
       Error="0.554951" Date="012617_105449" />
  </CoordinateDefinitions>

  <PlusOpenIGTLinkServer
    MaxNumberOfIgtlMessagesToSend="1"
    MaxTimeSpentWithProcessingMs="50"
    ListeningPort="18944"
    SendValidTransformsOnly="true"
    OutputChannelId="TrackedVideoStream" >
    <DefaultClientInfo>
      <MessageTypes>
        <Message Type="IMAGE" />
        <Message Type="TRANSFORM" />
      </MessageTypes>
      <ImageNames>
        <Image Name="Image" EmbeddedTransformToFrame="Reference" />
      </ImageNames>
      <TransformNames>
        <Transform Name="StylusTipToReference" />
      </TransformNames>
    </DefaultClientInfo>
  </PlusOpenIGTLinkServer>

</PlusConfiguration>