File Reporter 3.6.  File system scan on NSS volume.  Volume is on a cluster resource (OES2018sp1).  Scan is scheduled weekly and always runs fine until now.  I tail the log while the scan is running and see on a couple of paths...
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Skipping entry not in stage 1, 2 or 3 for path: '\\CLUSTER-ADMIN-DATA-SERVER\DOMDATA\Coast\PPG Renewal 2012\COAST Resub 1-13', path type: '2'
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Sleeping for 1 second at end of loop
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Iteration throttle count: 18295
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - ScanDataEntryEnumResultsSequenceIDs count: 5
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Skipping entry not in stage 1, 2 or 3 for path: '\\CLUSTER-ADMIN-DATA-SERVER\DOMDATA\Coast\PPG Renewal 2012\COAST Resub 1-13\Core B Biostats, Gangnon', path type: '2'
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Sleeping for 1 second at end of loop
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Iteration throttle count: 18296
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - ScanDataEntryEnumResultsSequenceIDs count: 5
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Skipping entry not in stage 1, 2 or 3 for path: '\\CLUSTER-ADMIN-DATA-SERVER\DOMDATA', path type: '2'
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Sleeping for 1 second at end of loop
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Iteration throttle count: 18297
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - ScanDataEntryEnumResultsSequenceIDs count: 5
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Skipping entry not in stage 1, 2 or 3 for path: '\\CLUSTER-ADMIN-DATA-SERVER\DOMDATA\Coast', path type: '2'
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Sleeping for 1 second at end of loop
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Iteration throttle count: 18298
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - ScanDataEntryEnumResultsSequenceIDs count: 5
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Skipping entry not in stage 1, 2 or 3 for path: '\\CLUSTER-ADMIN-DATA-SERVER\DOMDATA\Coast\PPG Renewal 2012', path type: '2'
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Sleeping for 1 second at end of loop
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - Iteration throttle count: 18299
2020-07-12 18:16:03 -18000 5 0006 13551 7f25477fe700 BuildScanDataEntriesForEnumeratedFSObjects() Wait Debug - ScanDataEntryEnumResultsSequenceIDs count: 5

I canceled the scan then kicked it off again and see the same thing.  Final message in the log is:

2020-07-12 20:37:47 -18000 3 8007 13551 7f25577fe700 CCNWUStorageHandleBasic::Free() - Called NWUDirHandleFree(0x043B0001, 2 ["[0]|DOMDATA:"]), Result = -1.

I have a drive mapped to the path and see nothing obviously wrong with the files.  The file are from 2013 so they have been there a while.  Does anyone have any thoughts?