Neo4j is already running

General
1

I am an associate professor using Neo4j for a class. Last year we used release 4.1.3 (Windows 10 on a MS Surface 6) with no problems. This year we are using 4.3.0 (also tried 4.3.10). When I run neo4j console I get the message "Neo4j is already running". A scan of the system shows that no processes and no tasks that look line neo4j are running on the machine. Also there is nothing in the startup folder for neo4j and we have been through the registry and deleted a few things related to Neo4j

I have tried neo4j uninstall-service. from all the above releases - didn't help. I don't think the service was ever installed.

If I reinstall 4.1.3, everything works fine, but 4.3.0 or 4.3.10 do not work. Anyone have any ideas on what is going on. It is probably something I missed. No one else here is having this problem, including students. So I am sure it is something unique to my machine or something I have done.
Thanx, Ed Holden.

2

It's a shame you never received a reply on this. I encountered the same issue on Red Hat 8 and it was because the process lock file (in my case /run/neo4j.pid) exists with a process ID, but the process is not running. I solved it by deleting the process lock file.

For those of use who use process lock files, it is customary for the program to see if the lock file exists and, if so, extract the process ID and ensure it is ACTUALLY RUNNING! But, alas, the folks at Neo don't seem to think that is a good idea?