Error:
'java.lang.NullPointerException at uk.co.corelogic.mosaic.domain.person.PersonInMerge.<init>(PersonInMerge.java:50) at uk.co.corelogic.mosaic.domain.person.PersonMergeDetails.<init>(PersonMergeDetails.java:41) at uk.co.corelogic.mosaic.domain.person.PersonMergeDetails.<init>(PersonMergeDetails.java:28) at uk.co.corelogic.mosaic.application.person.service.PersonMergeServiceImpl.retrie
veMergeSummary_aroundBody2(PersonMergeServiceImpl.java:107) at uk.co.corelogic.mosaic.application.person.service.PersonMergeServiceImpl$AjcC
losure3.run(PersonMergeServiceImpl.java:1)'
The error might happen because the person doesn't have an active primary address.
There is a known bug which allows a historic end dated address to be added as the Primary address. This issue will be fixed in a future release.
Setting an active (unended) address as the primary one should fix the error.