# Liquibase diff fail

**URL:** <https://forum.liquibase.org/t/liquibase-diff-fail/4134>\
**Category:** Liquibase Development\
**Created:** [January 31, 2020, 5:30pm UTC](https://forum.liquibase.org/t/liquibase-diff-fail/4134 "2020-01-31T17:30:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Alexis](https://avatars.discourse-cdn.com/v4/letter/a/838e76/32.png) [@Alexis](https://forum.liquibase.org/u/Alexis)\
**Post date:** [January 31, 2020, 5:30pm UTC](https://forum.liquibase.org/t/liquibase-diff-fail/4134/1 "2020-01-31T17:30:00Z")

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Hi all,

When I run liquibase diff, I get this error

```auto
[ERROR] Failed to execute goal org.liquibase:liquibase-maven-plugin:3.8.5:diff (default-cli) 
on project master-hipster-2: Error setting up or running Liquibase: 
javax.persistence.PersistenceException: Unable to resolve persistence unit root URL: class path 
resource [] cannot be resolved to URL because it does not exist -> [Help 1]

```

I use :

- Liquibase 3.8.5
- Liquibase hibernate 3.8
- Hibernate 5.4.10.Final
- Hibernate search 6
- Spring boot 2.2.4

Before the library update, I used

- Liquibase 3.6.3
- Liquibase hibernate 3.6
- Hibernate 5.3.9
- Hibernate search 5.3.9
- Spring boot 2.1.5

I don’t change my configuration after the update of spring, hibernate, or liquibase dependencies, I used liquibase maven plugins

Configuration inside pom.xml

Did you have any ideas of the origins of this error?

---

<div class="post-metadata">

**Author:** ![tabbyfoo](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/tabbyfoo/32/748_2.png) [@tabbyfoo](https://forum.liquibase.org/u/tabbyfoo)\
**Post date:** [October 3, 2022, 10:02pm UTC](https://forum.liquibase.org/t/liquibase-diff-fail/4134/2 "2022-10-03T22:02:11Z")

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Hello @Alexis - I’m reviewing some older posts and I came across yours. I edited it to show the code properly, but I didn’t see anything in the space under “Configuration inside pom.xml” - Was there meant to be a code snippet there? You probably have already resolved this, but I wanted to ask just in case.