This started happening after our upgrade to Jenkins v2.32.2.  The Dimensions plugin version used both before and after the upgrade is the same.

[DIMENSIONS] Checking out project "AIT:2017JUNDIIB"...
[DIMENSIONS] Checking out directory 'MessageBroker/EG'...
[DIMENSIONS] (Note: Dimensions command output was -

[DIMENSIONS] SUCCESS: 134 operations succeeded, 0 failed.
[DIMENSIONS] Operation completed
[DIMENSIONS] Operation completed
[DIMENSIONS] )
*[DIMENSIONS] Calculating changes for directory 'MessageBroker/EG'...
java.io.IOException: Failed to parse changelog*
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:622)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:529)
at hudson.model.Run.execute(Run.java:1728)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:404)
Caused by: java.lang.UnsupportedOperationException: getAffectedFiles() is not implemented by this SCM
at hudson.scm.ChangeLogSet$Entry.getAffectedFiles(ChangeLogSet.java:242)
at com.hp.application.automation.tools.octane.model.processors.scm.GenericSCMProcessor.buildScmCommits(GenericSCMProcessor.java:80)
at com.hp.application.automation.tools.octane.model.processors.scm.GenericSCMProcessor.getSCMData(GenericSCMProcessor.java:54)
at com.hp.application.automation.tools.octane.events.SCMListenerImpl.createSCMData(SCMListenerImpl.java:103)
at com.hp.application.automation.tools.octane.events.SCMListenerImpl.onChangeLogParsed(SCMListenerImpl.java:71)
at hudson.model.listeners.SCMListener.onChangeLogParsed(SCMListener.java:120)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:620)