# Install Neo4j 4.2.1 go wrong

**URL:** <https://community.neo4j.com/t/install-neo4j-4-2-1-go-wrong/30521>\
**Category:** Installation\
**Created:** [December 17, 2020, 6:29am UTC](https://community.neo4j.com/t/install-neo4j-4-2-1-go-wrong/30521 "2020-12-17T06:29:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![code\_jay](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/code_jay/32/5033_2.png) [@code\_jay](https://community.neo4j.com/u/code_jay)\
**Post date:** [December 17, 2020, 6:29am UTC](https://community.neo4j.com/t/install-neo4j-4-2-1-go-wrong/30521/1 "2020-12-17T06:29:40Z")

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> **[Windows installation - Operations Manual](https://neo4j.com/docs/operations-manual/current/installation/windows/)**
>
> How to install Neo4j on Windows.

- Neo4j version: 4.2.1, community edition
- OS: Windows 7
- Java version: 11.0.9  
I have followed up instruction to install Neo4j community server 4.2.1 on windows 7 and Java 11.0.9.

I can run the command:

bin\neo4j install-service  
bin\neo4j update-service  
bin\neo4j start  
bin\neo4j stop

it means I can start Neo4j server though windows services, I can browse the database throuth  
[http://localhost:7474](http://localhost:7474)

But I just can't run the command（after I have stoped the Neo4j windows service， so the port 7474 is free）  
bin\neo4j console

actually , If I change to use Neo4j community server 4.1.5, everything is ok.  
I don't know what happend

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<div class="post-metadata">

**Author:** ![code\_jay](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/code_jay/32/5033_2.png) [@code\_jay](https://community.neo4j.com/u/code_jay)\
**Post date:** [December 17, 2020, 10:18am UTC](https://community.neo4j.com/t/install-neo4j-4-2-1-go-wrong/30521/2 "2020-12-17T10:18:43Z")

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oh, I found it is a bug in neo4j-community-4.2.1\bin\Neo4j-Management\Invoke-Neo4j.ps1

at line 104, there is a line like that

$thisServer.AdditionalArguments = $AdditionalArguments

when I run it in Windows 7 , the variable $AdditionalArguments is a null Object, then it will cause error.  
so I have fixed this bug,

I just modify this line to like that

if ($AdditionalArguments -ne $null) {  
$thisServer.AdditionalArguments = $AdditionalArguments  
}