# \#neo4j-5

**URL:** https://community.neo4j.com/tag/neo4j-5/513.md

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## [Cannot reach bolt port after upgrade from v4 to v5](https://community.neo4j.com/t/cannot-reach-bolt-port-after-upgrade-from-v4-to-v5/62362)

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**Author:** [@boulanger](https://community.neo4j.com/u/boulanger)\
**Replies:** 5\
**Last updated:** [July 25, 2024, 2:17pm UTC](https://community.neo4j.com/t/cannot-reach-bolt-port-after-upgrade-from-v4-to-v5/62362 "2024-07-25T14:17:05Z")

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Hi, I have a neo4j v4.4 DBMS running on a Windows 10 machine and access it from a WSL instance via the IP 172.31.240.1 with no problem. I have now created a version 5.7 database and have configured, similarly to the v4…

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## [Better understanding neo4j 5 composite databases](https://community.neo4j.com/t/better-understanding-neo4j-5-composite-databases/61635)

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**Author:** [@pdrangeid](https://community.neo4j.com/u/pdrangeid)\
**Replies:** 2\
**Last updated:** [March 23, 2023, 2:10pm UTC](https://community.neo4j.com/t/better-understanding-neo4j-5-composite-databases/61635 "2023-03-23T14:10:52Z")

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I've read through Introduction - Operations Manual Is there any way to perform cross-database queries (read from one db, write nodes into another) without first configuring composite databases? Is the CREATE ALIAS impo…

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## [CALL {..} IN TRANSACTIONS does not work properly in Neo4j 5.4?](https://community.neo4j.com/t/call-in-transactions-does-not-work-properly-in-neo4j-5-4/61149)

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**Author:** [@busymo16](https://community.neo4j.com/u/busymo16)\
**Replies:** 5\
**Last updated:** [February 28, 2023, 4:41pm UTC](https://community.neo4j.com/t/call-in-transactions-does-not-work-properly-in-neo4j-5-4/61149 "2023-02-28T16:41:34Z")

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Hi everyone, I am trying to execute the following subquery for batching the deletion of 1+ mil nodes in my graph. MATCH (n) CALL{ WITH n DETACH DELETE n } IN TRANSACTIONS When I try the above query it …