# Ndi polaris failed to connect with plus

**URL:** <https://discourse.slicer.org/t/ndi-polaris-failed-to-connect-with-plus/2210>\
**Category:** Support\
**Tags:** plus\
**Created:** [February 28, 2018, 5:44pm UTC](https://discourse.slicer.org/t/ndi-polaris-failed-to-connect-with-plus/2210 "2018-02-28T17:44:41Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![emetss](https://avatars.discourse-cdn.com/v4/letter/e/90db22/32.png) [@emetss](https://discourse.slicer.org/u/emetss)\
**Post date:** [February 28, 2018, 5:44pm UTC](https://discourse.slicer.org/t/ndi-polaris-failed-to-connect-with-plus/2210/1 "2018-02-28T17:44:41Z")

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Operating system: windows 10, or ubuntu 16.04  
Plus version:2.6 or 2.7

I have an ndi polaris camera. It has a com port and is connected with the pc through com-usb adapter. The pc recognize it. But still cannot connect with plus. I choose “ndi polaris tracker with passive markers” as configuration xml file. and I tried to type “Serial Port = the com port number i have” but still no connection. Do you have ideas especially for this kind of Polaris camera connection?

regards,

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**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [February 28, 2018, 5:47pm UTC](https://discourse.slicer.org/t/ndi-polaris-failed-to-connect-with-plus/2210/2 "2018-02-28T17:47:12Z")

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See Andras’ response – better to provide necessary information over there and keep discussion in one thread.  
~~What brand of com-usb adapter? In my experience the only ones that worked correctly were FTDI chipset.~~

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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:** [February 28, 2018, 7:38pm UTC](https://discourse.slicer.org/t/ndi-polaris-failed-to-connect-with-plus/2210/3 "2018-02-28T19:38:18Z")

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Please report this at [https://github.com/PlusToolkit/PlusLib/issues](https://github.com/PlusToolkit/PlusLib/issues)

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**Author:** ![emetss](https://avatars.discourse-cdn.com/v4/letter/e/90db22/32.png) [@emetss](https://discourse.slicer.org/u/emetss)\
**Post date:** [March 2, 2018, 8:44pm UTC](https://discourse.slicer.org/t/ndi-polaris-failed-to-connect-with-plus/2210/4 "2018-03-02T20:44:33Z")

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I’m using the prolific one. My OS is windows 10. I also tried in ubuntu 16.04. the com is recognized in my pc but cannot connect with plus. I can also connect with other programs (like MITK) but not with Plus. Do you think using the FTDI one will solve the issue?

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**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [March 2, 2018, 8:45pm UTC](https://discourse.slicer.org/t/ndi-polaris-failed-to-connect-with-plus/2210/5 "2018-03-02T20:45:50Z")

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If it works in MITK then it’s probably just a problem in the PLUS configuration. I suggest to open an issue at [https://github.com/PlusToolkit/PlusLib/issues](https://github.com/PlusToolkit/PlusLib/issues) as Andras mentioned.