Symptoms

Restoring a NAS share to an alternate Share is failing with this error: ARN0001: Unable to restore NAS Asset. Please check logs for details because the following error occurred: Cannot invoke "java.util.List.stream()" because the return value of "com.emc.dpsg.ppdm.policy.service.codegen.model.AggregatePolicy is null. The job started at 2025-11-07T19:27:32.962985593Z and completed at 2025-11-07T19:27:33.866070225Z. The restore job for this NAS Asset cannot be completed because of an error occurred during the operation.

Cause

This issue happens when the target share for the restore is part of an exclusion policy.

Resolution

Remove the target asset from the Exclusion policy and retry the restore of the NAS asset. This is fixed in version ABOVE 19.22, from version 20.1 of PowerProtect Data Manager.

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