# SlicerIGT error: Received unknown device type POSITION, device=StylusToReference

**URL:** <https://discourse.slicer.org/t/slicerigt-error-received-unknown-device-type-position-device-stylustoreference/4895>\
**Category:** Development\
**Tags:** surgical-navigation, slicerigt\
**Created:** [November 27, 2018, 8:42pm UTC](https://discourse.slicer.org/t/slicerigt-error-received-unknown-device-type-position-device-stylustoreference/4895 "2018-11-27T20:42:52Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![banderies](https://avatars.discourse-cdn.com/v4/letter/b/cdc98d/32.png) [@banderies](https://discourse.slicer.org/u/banderies)\
**Post date:** [November 27, 2018, 8:42pm UTC](https://discourse.slicer.org/t/slicerigt-error-received-unknown-device-type-position-device-stylustoreference/4895/1 "2018-11-27T20:42:52Z")

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I am receiving an error from VTK when I connect a Polaris Vicra with SlicerIGT: Received unknown device type POSITION, device=StylusToReference. This is on Slicer 4.10.0. I have no problem on Slicer 4.8.1. I noticed that OpenIGTLink is now separate from SlicerIGT on 4.10.0 so I am assuming this has something to do with it. The extension manager only seems to be working on 4.10.0, otherwise I would just use 4.8.1. On versions other than 4.10.0, the extension manager never finishes “Loading extensions.”

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [November 28, 2018, 5:40am UTC](https://discourse.slicer.org/t/slicerigt-error-received-unknown-device-type-position-device-stylustoreference/4895/2 "2018-11-28T05:40:03Z")

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Use TRANSFORM instead of POSITION in the Plus device set configuration file.

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**Author:** ![banderies](https://avatars.discourse-cdn.com/v4/letter/b/cdc98d/32.png) [@banderies](https://discourse.slicer.org/u/banderies)\
**Post date:** [December 3, 2018, 4:00am UTC](https://discourse.slicer.org/t/slicerigt-error-received-unknown-device-type-position-device-stylustoreference/4895/3 "2018-12-03T04:00:35Z")

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I am currently using the OpenIGTLink program from NDI which is not configurable. I will let them know about this.

Thanks!

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [December 3, 2018, 4:10am UTC](https://discourse.slicer.org/t/slicerigt-error-received-unknown-device-type-position-device-stylustoreference/4895/4 "2018-12-03T04:10:37Z")

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You can use [PLUS toolkit](https://www.plustoolkit.org) instead.