I've just upgraded to Logos 7.17 on Windows 10 and it triggered a rebuild of the complete index.
The indexer log has:
2018-08-21 09:36:09.7639 7 Info LibraryIndex No resources need to be indexed.
2018-08-21 09:36:09.7659 7 Info LibraryIndex Re-indexing because the existing index is corrupt or missing.
So it may have been that the index was corrupt or missing! But it had been working fine and it seems rather coincidental.
I've attached the Logos.log and Logosindexer.log file.
0647.Logos.log
2318.LogosIndexer.log
I'm just wondering if there actually was a problem with my installation - in which case it should now be fixed - or if there is a wider problem with the Logos 7.17 update
Any insight appreciated.
Graham