# Remote view example in vtk.js

**URL:** https://discourse.vtk.org/t/remote-view-example-in-vtk-js/8822
**Category:** Web
**Created:** [June 28, 2022, 9:02am UTC](https://discourse.vtk.org/t/remote-view-example-in-vtk-js/8822 "2022-06-28T09:02:49Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![szm](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/s/5e9695/32.png) [@szm](https://discourse.vtk.org/u/szm)
#### Post date: [June 28, 2022, 9:02am UTC](https://discourse.vtk.org/t/remote-view-example-in-vtk-js/8822/1 "2022-06-28T09:02:49Z")

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I’m learning the remote view example in vtk.js ([vtk.js](https://kitware.github.io/vtk-js/examples/RemoteView.html)) . I have successfully worked on this example, but need expand it to multi-users. I referred the previous discussions and have configured Apache. When I open the browser, the backend window can popup, but there are some error messages in the browser. I have removed the sessionURL in the client codes in that example, are there any other codes need change?  
Thanks in advance.

Zhuangming Shen

 ![image](https://discourse.vtk.org/uploads/default/original/2X/d/dd3087c72d1eb8fab19f3cae96077c2a36cdd316.png)

 ![image](https://discourse.vtk.org/uploads/default/original/2X/e/e22c9523ec3d504f3418e4c3c5397ec851c8e6fe.png)

 ![image](https://discourse.vtk.org/uploads/default/original/2X/e/ebae8643ef8780bad168f83cb2c8c2b8b99df653.png)

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### Author: ![Sebastien\_Jourdain](https://discourse.vtk.org/user_avatar/discourse.vtk.org/sebastien_jourdain/32/100_2.png) [@Sebastien\_Jourdain](https://discourse.vtk.org/u/Sebastien_Jourdain)
#### Post date: [June 29, 2022, 8:49am UTC](https://discourse.vtk.org/t/remote-view-example-in-vtk-js/8822/2 "2022-06-29T08:49:36Z")

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Please share the full network exchange.  
But based on what you are saying, the launcher seems to properly start a new process per user but the client fail to connect back to it. Usually when that happen, it is because something is not working between the launcher writing `D:/Reference/Project/remote_remdering_v2/proxy.txt` and apache reading it.

Does that file provide the proper mapping between session id and host:port?  
If so, does Apache is able to read it (no access error?)

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### Author: ![szm](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/s/5e9695/32.png) [@szm](https://discourse.vtk.org/u/szm)
#### Post date: [June 30, 2022, 7:45am UTC](https://discourse.vtk.org/t/remote-view-example-in-vtk-js/8822/6 "2022-06-30T07:45:33Z")

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@Sebastien_Jourdain Thanks for your useful response. I finally realized my sessionURL configuration in launcher.config is not correct. Now it can work. Thanks again.