# Which version of Neo 4J driver to install for Neo4j versions 4.0 and 4.1

**URL:** <https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008>\
**Category:** Graph Data Science / Graph Analytics\
**Created:** [July 20, 2020, 3:20pm UTC](https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008 "2020-07-20T15:20:11Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![lavanya\_kannan](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/lavanya_kannan/32/8545_2.png) [@lavanya\_kannan](https://community.neo4j.com/u/lavanya_kannan)\
**Post date:** [July 20, 2020, 3:20pm UTC](https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008/1 "2020-07-20T15:20:11Z")

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Hello,

Kindly let us know which version of the neo driver is compatible with versions 4.0 and 4.1 for ubuntu 18.04 OS.

I am asking this in relation to the error message that I get while running queries on the browser and cyphershell :

```auto
slight_smile:
ServiceUnavailable: Could not perform discovery. No routing servers available. Known routing table: RoutingTable[database=neo4j, expirationTime=1595250403752, currentTime=1595253070997, routers=[], readers=[], writers=[]]

```

Thanks,  
Lavanya

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**Author:** ![MuddyBootsCode](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/muddybootscode/32/10330_2.png) [@MuddyBootsCode](https://community.neo4j.com/u/MuddyBootsCode)\
**Post date:** [July 20, 2020, 7:02pm UTC](https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008/2 "2020-07-20T19:02:25Z")

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> [@lavanya\_kannan](#):
>
> `ServiceUnavailable: Could not perform discovery. No routing servers available. Known routing table: RoutingTable[database=neo4j, expirationTime=1595250403752, currentTime=1595253070997, routers=[], readers=[], writers=[]]`

I'm not sure if you've seen this [Cannot Query: "Could not perform discovery. No routing servers available." · Issue #516 · neo4j/neo4j-javascript-driver · GitHub](https://github.com/neo4j/neo4j-javascript-driver/issues/516) but it helped someone with a similar question.

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**Author:** ![MuddyBootsCode](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/muddybootscode/32/10330_2.png) [@MuddyBootsCode](https://community.neo4j.com/u/MuddyBootsCode)\
**Post date:** [July 20, 2020, 7:03pm UTC](https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008/3 "2020-07-20T19:03:54Z")

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Also here, [Neo4jError: Could not perform discovery. No routing servers available - #3 by john.kennedy](https://community.neo4j.com/t/neo4jerror-could-not-perform-discovery-no-routing-servers-available/13115/3)

I know when I did it I had to add the ENCRYPTION piece:

```auto
const driver = neo4j.driver('URL', neo4j.auth.basic('neo4j', password), { encrypted: 'ENCRYPTION_ON' })

```

Where as before I did not.

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**Author:** ![lavanya\_kannan](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/lavanya_kannan/32/8545_2.png) [@lavanya\_kannan](https://community.neo4j.com/u/lavanya_kannan)\
**Post date:** [July 20, 2020, 8:05pm UTC](https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008/4 "2020-07-20T20:05:11Z")

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@MuddyBootsCode thanks! Is the ENCRYPTION piece that you are suggesting:

```auto
const driver = neo4j.driver('URL', neo4j.auth.basic('neo4j', password), { encrypted: 'ENCRYPTION_ON' })

```

to be added in the neo4j.conf file? Thanks

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<div class="post-metadata">

**Author:** ![MuddyBootsCode](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/muddybootscode/32/10330_2.png) [@MuddyBootsCode](https://community.neo4j.com/u/MuddyBootsCode)\
**Post date:** [July 20, 2020, 11:25pm UTC](https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008/5 "2020-07-20T23:25:20Z")

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No it would be when you create the driver instance.

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**Author:** ![bhoopalkiranappmajix](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/bhoopalkiranappmajix/32/12903_2.png) [@bhoopalkiranappmajix](https://community.neo4j.com/u/bhoopalkiranappmajix)\
**Post date:** [August 21, 2020, 6:10am UTC](https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008/6 "2020-08-21T06:10:44Z")

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**Author:** ![gcpmasters.in](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/gcpmasters.in/32/30409_2.png) [@gcpmasters.in](https://community.neo4j.com/u/gcpmasters.in)\
**Post date:** [January 9, 2024, 7:45am UTC](https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008/8 "2024-01-09T07:45:33Z")

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**Author:** ![gcpmasters.in](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/gcpmasters.in/32/30409_2.png) [@gcpmasters.in](https://community.neo4j.com/u/gcpmasters.in)\
**Post date:** [January 9, 2024, 7:47am UTC](https://community.neo4j.com/t/which-version-of-neo-4j-driver-to-install-for-neo4j-versions-4-0-and-4-1/22008/9 "2024-01-09T07:47:15Z")

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