# How to solve errors occured when two Paraview clients connect to a pvserver?

**URL:** https://discourse.paraview.org/t/how-to-solve-errors-occured-when-two-paraview-clients-connect-to-a-pvserver/5362
**Category:** ParaView Support
**Created:** [September 16, 2020, 8:42am UTC](https://discourse.paraview.org/t/how-to-solve-errors-occured-when-two-paraview-clients-connect-to-a-pvserver/5362 "2020-09-16T08:42:27Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![Jerry](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/5daacb/32.png) [@Jerry](https://discourse.paraview.org/u/Jerry)
#### Post date: [September 16, 2020, 8:42am UTC](https://discourse.paraview.org/t/how-to-solve-errors-occured-when-two-paraview-clients-connect-to-a-pvserver/5362/1 "2020-09-16T08:42:27Z")

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I have made a ParaView server by two virtual machine on a host machine. It is normal when I connect to the server using only one ParaView client. But errors(as follow pic) occured when I connect the server using the second ParaView client. In other words, my server side can’t be connected by more than one ParaView client in the same time.

 ![image](https://discourse.paraview.org/uploads/default/original/2X/8/86de6e82a8445865314d32ec1326fe3fc6f274ad.png)

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [September 16, 2020, 8:43am UTC](https://discourse.paraview.org/t/how-to-solve-errors-occured-when-two-paraview-clients-connect-to-a-pvserver/5362/2 "2020-09-16T08:43:47Z")

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`pvserver --multi-clients`

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### Author: ![Jerry](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/5daacb/32.png) [@Jerry](https://discourse.paraview.org/u/Jerry)
#### Post date: [September 16, 2020, 9:04am UTC](https://discourse.paraview.org/t/how-to-solve-errors-occured-when-two-paraview-clients-connect-to-a-pvserver/5362/3 "2020-09-16T09:04:56Z")

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Thank you Mathieu!! By the way if there is a quantitative limitation of clients of a ParaView server side.

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [September 16, 2020, 9:06am UTC](https://discourse.paraview.org/t/how-to-solve-errors-occured-when-two-paraview-clients-connect-to-a-pvserver/5362/4 "2020-09-16T09:06:39Z")

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multi client is a collaborative mode where each client see the same data, not a server in a web service sense.  
I do not think there is a hard limit but it was not designed with scalability in mind and I would not recommend connecting more than 4 clients.

BTW, this mode is being phased out and may be removed in the future.

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### Author: ![Jerry](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/j/5daacb/32.png) [@Jerry](https://discourse.paraview.org/u/Jerry)
#### Post date: [September 17, 2020, 1:37am UTC](https://discourse.paraview.org/t/how-to-solve-errors-occured-when-two-paraview-clients-connect-to-a-pvserver/5362/5 "2020-09-17T01:37:32Z")

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Thank you Mathieu! This mode is not what I want. I want to have a server that can serve several clients and those clients working apartly from each other just like what I drew follows(forgive my poor drawing work). If there a way to achieve what I want?



 ![IMG_0409.PNG](https://discourse.paraview.org/uploads/default/original/2X/6/663c8f14ca436b580e4a159276a059c7ea778fdb.jpeg)

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [September 17, 2020, 7:49am UTC](https://discourse.paraview.org/t/how-to-solve-errors-occured-when-two-paraview-clients-connect-to-a-pvserver/5362/6 "2020-09-17T07:49:58Z")

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This is not supported directly by ParaView. Looks like you want something akin to ParaViewWeb visualizer mechanism or a script system that will create a pvserver everytime a user needs it.

_Awesome drawing skills btw. 🐵 🐇 🤖._