I recall some discussion about ghost nodes and/or undeleted .bsy files.
I already explained to him the need to check for stale undeleted .bsy files.
If he used kill -9 or CTRL+Z or anything to stop a process incorrectly, it will leave all of the BSY files intact. They cannot be managed when the software is abruptly shutdown. This is the primary cause of that issue.
Usually running "fidopoll killbusy all" when nothing is running will clean up the BSY files.
--- Mystic BBS v1.12 A36 2017/11/10 (Windows/32)
* Origin: Sector 7 [Mystic BBS WHQ] (21:1/108)