# Cannot start Neo4j 4.0.0 **URL:** \ **Category:** General\ **Created:** [January 22, 2020, 9:04am UTC](https://community.neo4j.com/t/cannot-start-neo4j-4-0-0/13895 "2020-01-22T09:04:49Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![harvey\_nguyen](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/harvey_nguyen/32/3290_2.png) [@harvey\_nguyen](https://community.neo4j.com/u/harvey_nguyen)\ **Post date:** [January 22, 2020, 9:04am UTC](https://community.neo4j.com/t/cannot-start-neo4j-4-0-0/13895/1 "2020-01-22T09:04:49Z")
I have just installed Neo4j 4.0.0 Enterprise edition by using Neo4j Debian package. At the first time I started, It run properly. After that, I stop service to install APOC and Algo plugins and started it again. The error has occured ```auto Argument `nodeIds` at position 0 in `list` with type `List` cannot be converted to a Neo4j type: Default value `` could not be parsed as a LIST? OF INTEGER? ``` What's happened with my Neo4j and how to fix it ? Thank you ![cannot start.png](https://us1.discourse-cdn.com/flex021/uploads/neo4jcommunity/original/2X/b/b37fbc3ed65fed497285b4cfaf12f8b0985da5a3.jpeg) ---
**Author:** ![omerule](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/omerule/32/784_2.png) [@omerule](https://community.neo4j.com/u/omerule)\ **Post date:** [January 22, 2020, 7:53pm UTC](https://community.neo4j.com/t/cannot-start-neo4j-4-0-0/13895/2 "2020-01-22T19:53:47Z")
Goodevening, Good it be that the APOC and/or ALGO plugin is NOT version 4.xxx? Yours kindly Omer ---
**Author:** ![anthapu](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/anthapu/32/4113_2.png) [@anthapu](https://community.neo4j.com/u/anthapu)\ **Post date:** [January 22, 2020, 11:05pm UTC](https://community.neo4j.com/t/cannot-start-neo4j-4-0-0/13895/3 "2020-01-22T23:05:33Z")
Hi Harvey, Graph algorithms are not compatible with 4.0 yet. I believe APOC 4.0 compatible version was released recently. Use that jar and remove graph algorithms plugin. Thanks Ravi ---
**Author:** ![stefan.armbruster](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/stefan.armbruster/32/74_2.png) [@stefan.armbruster](https://community.neo4j.com/u/stefan.armbruster)\ **Post date:** [January 23, 2020, 9:28am UTC](https://community.neo4j.com/t/cannot-start-neo4j-4-0-0/13895/4 "2020-01-23T09:28:28Z")
If the issue persists after removal of algo plugin, also remove apoc to bisect if it's an apoc issue or something else. ---
**Author:** ![harvey\_nguyen](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/harvey_nguyen/32/3290_2.png) [@harvey\_nguyen](https://community.neo4j.com/u/harvey_nguyen)\ **Post date:** [January 31, 2020, 3:04am UTC](https://community.neo4j.com/t/cannot-start-neo4j-4-0-0/13895/5 "2020-01-31T03:04:04Z")
Thanks @anthapu for your solution, @stefan.armbruster I have just remove algorithms plugin and started it again. Neo4j work well. However, I am using unionFind algorithm in 3.5 version. So I have to wait a new release for graph algorithms plugin? Are there any solutions if I want to using neo4j 4.0? Thanks Harvey ---
**Author:** ![stefan.armbruster](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/stefan.armbruster/32/74_2.png) [@stefan.armbruster](https://community.neo4j.com/u/stefan.armbruster)\ **Post date:** [January 31, 2020, 8:56am UTC](https://community.neo4j.com/t/cannot-start-neo4j-4-0-0/13895/6 "2020-01-31T08:56:15Z")
You'll have to wait for Algo plugin to work with 4.0. I'd guess it's a few weeks out. ---
**Author:** ![HashRocketSyntax](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/hashrocketsyntax/32/7230_2.png) [@HashRocketSyntax](https://community.neo4j.com/u/HashRocketSyntax)\ **Post date:** [March 7, 2020, 11:35pm UTC](https://community.neo4j.com/t/cannot-start-neo4j-4-0-0/13895/7 "2020-03-07T23:35:09Z")
Just ran into this issue myself.