# NEW: Liquibase Fundamentals Certification

**URL:** <https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403>\
**Category:** General Discussion\
**Created:** [July 15, 2020, 6:20pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403 "2020-07-15T18:20:32Z")\
**Posts on this page:** 13\
**Page:** 1

<div class="post-metadata">

**Author:** ![kevin](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/kevin/32/244_2.png) [@kevin](https://forum.liquibase.org/u/kevin)\
**Post date:** [July 15, 2020, 6:20pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/1 "2020-07-15T18:20:32Z")

</div>

Hey everyone! We just launched the first Liquibase certification at Liquibase University - Liquibase Fundamentals! If you want to learn more about Liquibase or verify your skills, sign up for free at [https://learn.liquibase.com](https://learn.liquibase.com).

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<div class="post-metadata">

**Author:** ![ronak](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/ronak/32/221_2.png) [@ronak](https://forum.liquibase.org/u/ronak)\
**Post date:** [July 17, 2020, 8:00pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/2 "2020-07-17T20:00:55Z")

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I think its a great time to pick up a devops / db automation certificate!

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<div class="post-metadata">

**Author:** ![abhixkj](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/abhixkj/32/212_2.png) [@abhixkj](https://forum.liquibase.org/u/abhixkj)\
**Post date:** [July 24, 2020, 1:07pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/3 "2020-07-24T13:07:43Z")

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Hi Kevin,  
I just completed my certification but I am not able to add it LinkedIn. I can not find any Credential URL or Credential ID to link to my LinedIn profile. I can download and see it anyway, the certification looks good 😊

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<div class="post-metadata">

**Author:** ![ronak](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/ronak/32/221_2.png) [@ronak](https://forum.liquibase.org/u/ronak)\
**Post date:** [July 24, 2020, 1:23pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/4 "2020-07-24T13:23:29Z")

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Welcome @abhixkj, I will work with the head of our LMS to help out with getting the cert linked in.

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<div class="post-metadata">

**Author:** ![kevin](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/kevin/32/244_2.png) [@kevin](https://forum.liquibase.org/u/kevin)\
**Post date:** [July 24, 2020, 1:24pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/5 "2020-07-24T13:24:22Z")

</div>

Congratulations on completing the certification! I’ll have Ronak reach out and help you with the credentialing in LinkedIn.

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<div class="post-metadata">

**Author:** ![kevin](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/kevin/32/244_2.png) [@kevin](https://forum.liquibase.org/u/kevin)\
**Post date:** [July 24, 2020, 1:27pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/6 "2020-07-24T13:27:04Z")

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@ronak is fast! You beat me to it. Thanks!

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<div class="post-metadata">

**Author:** ![ronak](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/ronak/32/221_2.png) [@ronak](https://forum.liquibase.org/u/ronak)\
**Post date:** [July 24, 2020, 1:31pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/7 "2020-07-24T13:31:35Z")

</div>

@AristyCat has a good idea what it may be. Standby.

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<div class="post-metadata">

**Author:** ![AristyCat](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/aristycat/32/213_2.png) [@AristyCat](https://forum.liquibase.org/u/AristyCat)\
**Post date:** [July 24, 2020, 1:46pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/8 "2020-07-24T13:46:02Z")

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Hello @abhixkj!

I was able to verify that the system did propagate your certification. An email would have been sent to your registered email address. A lot of times this email ends up in a Spam or Junk folder. If you are using Microsoft Outlook, also check your “Other” folder. Here is the receipient view of your certification: [See Accreditation](https://www.credential.net/4ed0feb8-4439-4efd-a9bb-b6b48cfd3fbd?_ga=2.207231387.905039299.1595595912-2129204181.1593533091).

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<div class="post-metadata">

**Author:** ![abhixkj](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/abhixkj/32/212_2.png) [@abhixkj](https://forum.liquibase.org/u/abhixkj)\
**Post date:** [July 24, 2020, 4:11pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/9 "2020-07-24T16:11:09Z")

</div>

Hey, thanks guys for the fast response 🙌, I was able to add it now. It was sent via a separate mail from Accredible. ✌

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<div class="post-metadata">

**Author:** ![ronak](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/ronak/32/221_2.png) [@ronak](https://forum.liquibase.org/u/ronak)\
**Post date:** [July 27, 2020, 1:14pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/10 "2020-07-27T13:14:42Z")

</div>

Awesome @abhixkj! Great work, thanks for completing the Fundamentals course!

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<div class="post-metadata">

**Author:** ![sarkong](https://avatars.discourse-cdn.com/v4/letter/s/59ef9b/32.png) [@sarkong](https://forum.liquibase.org/u/sarkong)\
**Post date:** [October 5, 2020, 11:08pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/11 "2020-10-05T23:08:35Z")

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Hello All

I am having trouble in Liquibase Fundamental Module-3 where I used mvn liquibase:update and it failed to update.

My pom.xml file modified according the given instructions and I am having troubleshooting the following issue:

Failed to execute goal org.liquibase:liquibase-maven-plugin:4.0.0:update (default-cli) on project Liquih2-app: Execution default-cli of goal org.liquibase:liquibase-maven-plugin:4.0.0:update failed: Plugin org.liquibase:liquibase-maven-plugin:4.0.0 or one of its dependencies could not be resolved: Could not find artifact h2:h2:jar:1.0-SNAPSHOT -\> [Help 1]

I am looking forward to receiving your reply soon.

Sincerely  
Sar Kong

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<div class="post-metadata">

**Author:** ![sarkong](https://avatars.discourse-cdn.com/v4/letter/s/59ef9b/32.png) [@sarkong](https://forum.liquibase.org/u/sarkong)\
**Post date:** [October 6, 2020, 1:53am UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/12 "2020-10-06T01:53:50Z")

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Dear Alll  
I am having a problem with Module-3 mvn liquibase:update with pom.xml complaining - version can neither be null, empty nor blank for h2.

I am grantful if you would shading some light on my problem, please.

I am looking forward to receiving your reply soon.

Many thanks in advance.

Yours sincerly  
Sar Kong  
[sar.kong@gmail.com](mailto:sar.kong@gmail.com)

The following is my pom.xml

4.0.0  
com.my-group.app  
Liquih2-app  
1.0-SNAPSHOT  
  
  
  
  
org.liquibase  
liquibase-maven-plugin  
4.0.0  
  
liquibase.properties  
  
  
  
h2  
h2

The following output with debug mode:X

C:\Users\oracle\app\MavenDBType\MavenH2\>mvn -X liquibase:update  
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)  
Maven home: C:\Program Files\apache-maven-3.6.3\bin…  
Java version: 15, vendor: Oracle Corporation, runtime: C:\Program Files\Java\jdk-15  
Default locale: en\_AU, platform encoding: Cp1252  
OS name: “windows 10”, version: “10.0”, arch: “amd64”, family: “windows”  
[DEBUG] Created new class realm maven.api  
[DEBUG] Importing foreign packages into class realm maven.api  
[DEBUG] Imported: javax.annotation.\* \< plexus.core  
[DEBUG] Imported: javax.annotation.security.\* \< plexus.core  
[DEBUG] Imported: javax.enterprise.inject.\* \< plexus.core  
[DEBUG] Imported: javax.enterprise.util.\* \< plexus.core  
[DEBUG] Imported: javax.inject.\* \< plexus.core  
[DEBUG] Imported: org.apache.maven.\* \< plexus.core  
[DEBUG] Imported: org.apache.maven.artifact \< plexus.core  
[DEBUG] Imported: org.apache.maven.classrealm \< plexus.core  
[DEBUG] Imported: org.apache.maven.cli \< plexus.core  
[DEBUG] Imported: org.apache.maven.configuration \< plexus.core  
[DEBUG] Imported: org.apache.maven.exception \< plexus.core  
[DEBUG] Imported: org.apache.maven.execution \< plexus.core  
[DEBUG] Imported: org.apache.maven.execution.scope \< plexus.core  
[DEBUG] Imported: org.apache.maven.lifecycle \< plexus.core  
[DEBUG] Imported: org.apache.maven.model \< plexus.core  
[DEBUG] Imported: org.apache.maven.monitor \< plexus.core  
[DEBUG] Imported: org.apache.maven.plugin \< plexus.core  
[DEBUG] Imported: org.apache.maven.profiles \< plexus.core  
[DEBUG] Imported: org.apache.maven.project \< plexus.core  
[DEBUG] Imported: org.apache.maven.reporting \< plexus.core  
[DEBUG] Imported: org.apache.maven.repository \< plexus.core  
[DEBUG] Imported: org.apache.maven.rtinfo \< plexus.core  
[DEBUG] Imported: org.apache.maven.settings \< plexus.core  
[DEBUG] Imported: org.apache.maven.toolchain \< plexus.core  
[DEBUG] Imported: org.apache.maven.usability \< plexus.core  
[DEBUG] Imported: org.apache.maven.wagon.\* \< plexus.core  
[DEBUG] Imported: org.apache.maven.wagon.authentication \< plexus.core  
[DEBUG] Imported: org.apache.maven.wagon.authorization \< plexus.core  
[DEBUG] Imported: org.apache.maven.wagon.events \< plexus.core  
[DEBUG] Imported: org.apache.maven.wagon.observers \< plexus.core  
[DEBUG] Imported: org.apache.maven.wagon.proxy \< plexus.core  
[DEBUG] Imported: org.apache.maven.wagon.repository \< plexus.core  
[DEBUG] Imported: org.apache.maven.wagon.resource \< plexus.core  
[DEBUG] Imported: org.codehaus.classworlds \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.\* \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.classworlds \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.component \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.configuration \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.container \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.context \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.lifecycle \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.logging \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.personality \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.util.xml.Xpp3Dom \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlPullParser \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlPullParserException \< plexus.core  
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlSerializer \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.\* \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.artifact \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.collection \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.deployment \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.graph \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.impl \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.installation \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.internal.impl \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.metadata \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.repository \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.resolution \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.spi \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.transfer \< plexus.core  
[DEBUG] Imported: org.eclipse.aether.version \< plexus.core  
[DEBUG] Imported: org.fusesource.jansi.\* \< plexus.core  
[DEBUG] Imported: org.slf4j.\* \< plexus.core  
[DEBUG] Imported: org.slf4j.event.\* \< plexus.core  
[DEBUG] Imported: org.slf4j.helpers.\* \< plexus.core  
[DEBUG] Imported: org.slf4j.spi.\* \< plexus.core  
[DEBUG] Populating class realm maven.api  
[INFO] Error stacktraces are turned on.  
[DEBUG] Message scheme: color  
[DEBUG] Message styles: debug info warning error success failure strong mojo project  
[DEBUG] Reading global settings from C:\Program Files\apache-maven-3.6.3\bin…\conf\settings.xml  
[DEBUG] Reading user settings from C:\Users\oracle.m2\settings.xml  
[DEBUG] Reading global toolchains from C:\Program Files\apache-maven-3.6.3\bin…\conf\toolchains.xml  
[DEBUG] Reading user toolchains from C:\Users\oracle.m2\toolchains.xml  
[DEBUG] Using local repository at C:\Users\oracle.m2\repository  
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10.0 for C:\Users\oracle.m2\repository  
[INFO] Scanning for projects…  
[DEBUG] Extension realms for project com.my-group.app:h2:jar:1.0-SNAPSHOT: (none)  
[DEBUG] Looking up lifecycle mappings for packaging jar from ClassRealm[plexus.core, parent: null]  
[DEBUG] Resolving plugin prefix liquibase from [org.apache.maven.plugins, org.codehaus.mojo]  
[DEBUG] Resolved plugin prefix liquibase to org.liquibase:liquibase-maven-plugin from POM com.my-group.app:h2:jar:1.0-SNAPSHOT  
[DEBUG] === REACTOR BUILD PLAN ================================================  
[DEBUG] Project: com.my-group.app:h2:jar:1.0-SNAPSHOT  
[DEBUG] Tasks: [liquibase:update]  
[DEBUG] Style: Regular  
[DEBUG] =======================================================================  
[INFO]  
[INFO] ------------------------\< com.my-group.app:h2 \>-------------------------  
[INFO] Building h2 1.0-SNAPSHOT  
[INFO] --------------------------------[jar]---------------------------------  
[DEBUG] Resolving plugin prefix liquibase from [org.apache.maven.plugins, org.codehaus.mojo]  
[DEBUG] Resolved plugin prefix liquibase to org.liquibase:liquibase-maven-plugin from POM com.my-group.app:h2:jar:1.0-SNAPSHOT  
[DEBUG] Lifecycle default -\> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]  
[DEBUG] Lifecycle clean -\> [pre-clean, clean, post-clean]  
[DEBUG] Lifecycle site -\> [pre-site, site, post-site, site-deploy]  
[DEBUG] === PROJECT BUILD PLAN ================================================  
[DEBUG] Project: com.my-group.app:h2:1.0-SNAPSHOT  
[DEBUG] Dependencies (collect):   
[DEBUG] Dependencies (resolve): [test]  
[DEBUG] Repositories (dependencies): [central ([https://repo.maven.apache.org/maven2](https://repo.maven.apache.org/maven2), default, releases)]  
[DEBUG] Repositories (plugins) : [central ([https://repo.maven.apache.org/maven2](https://repo.maven.apache.org/maven2), default, releases)]  
[DEBUG] -----------------------------------------------------------------------  
[DEBUG] Goal: org.liquibase:liquibase-maven-plugin:4.0.0:update (default-cli)  
[DEBUG] Style: Regular  
[DEBUG] Configuration: \<?xml version="1.0" encoding="UTF-8"?\>  
  
{liquibase.changeLogDirectory}\</changeLogDirectory\> \<changeLogFile\>{liquibase.changeLogFile}  
{liquibase.changelogCatalogName}\</changelogCatalogName\> \<changelogSchemaName\>{liquibase.changelogSchemaName}  
{liquibase.changesToApply}\</changesToApply\> \<clearCheckSums default-value="false"\>{liquibase.clearCheckSums}  
{liquibase.contexts}\</contexts\> \<databaseChangeLogLockTableName\>{liquibase.databaseChangeLogLockTableName}  
{liquibase.databaseChangeLogTableName}\</databaseChangeLogTableName\> \<databaseClass\>{liquibase.databaseClass}  
{liquibase.defaultCatalogName}\</defaultCatalogName\> \<defaultSchemaName\>{liquibase.defaultSchemaName}  
{liquibase.driver}\</driver\> \<dropFirst default-value="false"\>{liquibase.dropFirst}  
{liquibase.emptyPassword}\</emptyPassword\> \<includeArtifact default-value="true"\>{liquibase.includeArtifact}  
{liquibase.includeTestOutputDirectory}\</includeTestOutputDirectory\> \<labels default-value=""\>{liquibase.labels}  
{liquibase.liquibaseProLicenseKey}\</liquibaseProLicenseKey\> \<logging default-value="INFO"\>{liquibase.logging}  
{liquibase.outputDefaultCatalog}\</outputDefaultCatalog\> \<outputDefaultSchema default-value="false"\>{liquibase.outputDefaultSchema}  
{liquibase.outputFileEncoding}\</outputFileEncoding\> \<password\>{liquibase.password}  
{project}\</project\> \<promptOnNonLocalDatabase default-value="true"\>{liquibase.promptOnNonLocalDatabase}  
liquibase.properties  
{liquibase.propertyFileWillOverride}\</propertyFileWillOverride\> \<propertyProviderClass\>{liquibase.propertyProviderClass}  
{liquibase.server}\</server\> \<skip default-value="false"\>{liquibase.skip}  
{liquibase.toTag}\</toTag\> \<url\>{liquibase.url}  
{liquibase.username}\</username\> \<verbose default-value="false"\>{liquibase.verbose}  
  
[DEBUG] =======================================================================  
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=42900, ConflictMarker.markTime=59800, ConflictMarker.nodeCount=1, ConflictIdSorter.graphTime=13500, ConflictIdSorter.topsortTime=395300, ConflictIdSorter.conflictIdCount=0, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=1080300, ConflictResolver.conflictItemCount=0, DefaultDependencyCollector.collectTime=92200, DefaultDependencyCollector.transformTime=2781500}  
[DEBUG] com.my-group.app:h2:jar:1.0-SNAPSHOT  
[INFO]  
[INFO] — liquibase-maven-plugin:4.0.0:update (default-cli) @ h2 —  
[INFO] ------------------------------------------------------------------------  
[INFO] BUILD FAILURE  
[INFO] ------------------------------------------------------------------------  
[INFO] Total time: 0.631 s  
[INFO] Finished at: 2020-10-03T16:16:04+10:00  
[INFO] ------------------------------------------------------------------------  
[ERROR] version can neither be null, empty nor blank  
java.lang.IllegalArgumentException: version can neither be null, empty nor blank  
at org.apache.commons.lang3.Validate.notBlank (Validate.java:454)  
at org.apache.maven.artifact.ArtifactUtils.notBlank (ArtifactUtils.java:107)  
at org.apache.maven.artifact.ArtifactUtils.key (ArtifactUtils.java:97)  
at org.apache.maven.ReactorReader.findArtifact (ReactorReader.java:101)  
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve (DefaultArtifactResolver.java:306)  
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts (DefaultArtifactResolver.java:229)  
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact (DefaultArtifactResolver.java:207)  
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom (DefaultArtifactDescriptorReader.java:240)  
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor (DefaultArtifactDescriptorReader.java:171)  
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.resolveCachedArtifactDescriptor (DefaultDependencyCollector.java:541)  
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.getArtifactDescriptorResult (DefaultDependencyCollector.java:524)  
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.processDependency (DefaultDependencyCollector.java:412)  
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.processDependency (DefaultDependencyCollector.java:365)  
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.process (DefaultDependencyCollector.java:352)  
at org.eclipse.aether.internal.impl.collect.DefaultDependencyCollector.collectDependencies (DefaultDependencyCollector.java:254)  
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.collectDependencies (DefaultRepositorySystem.java:284)  
at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolveInternal (DefaultPluginDependenciesResolver.java:205)  
at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve (DefaultPluginDependenciesResolver.java:152)  
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.createPluginRealm (DefaultMavenPluginManager.java:404)  
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.setupPluginRealm (DefaultMavenPluginManager.java:374)  
at org.apache.maven.plugin.DefaultBuildPluginManager.getPluginRealm (DefaultBuildPluginManager.java:234)  
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:105)  
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)  
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)  
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)  
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)  
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)  
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)  
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)  
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)  
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)  
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)  
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)  
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)  
at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)  
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)  
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:64)  
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)  
at java.lang.reflect.Method.invoke (Method.java:564)  
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)  
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)  
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)  
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)  
[ERROR]

---

<div class="post-metadata">

**Author:** ![ronak](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.liquibase.org/ronak/32/221_2.png) [@ronak](https://forum.liquibase.org/u/ronak)\
**Post date:** [October 6, 2020, 1:47pm UTC](https://forum.liquibase.org/t/new-liquibase-fundamentals-certification/4403/13 "2020-10-06T13:47:16Z")

</div>

Welcome @sarkong!  
This error message concerned me:

> [@sarkong](#):
>
> [ERROR] version can neither be null, empty nor blank  
> java.lang.IllegalArgumentException: version can neither be null, empty nor blank

Don’t think this is a liquibase problem but a config issue of maven. To diagnose could you your pom.xml and settings.xml (please redact password and user id).

Ronak