7830: The indexing thread has terminated. The LaserFiche server must be restarted before documents can be indexed.
March 12, 2004 | KB: 90360
https://support.laserfiche.com/kb/90360/7830-the-indexing-thread-has-terminated-the-laserfiche-server-must-be-restarted-before-documents-can-be-indexed-
Laserfiche 6, Plus 6
Workaround
Restart the LaserFiche Server and then try reindexing your documents.