I can only guess ...
We experienced something similar in the past, but always it reveals to be a 
problem caused by us. An example: Usually our server apps are updated 
automatically during the night, so the service hat to be restarted by the 
update script. In nearly all cases it works very well, but it happened that 
there were an error in the startup code of the new version and we got a 
problem. Not nice, but ...

If we are faced with such problems, I restart the server app as a normal 
application not as a service, only to look if there are some error messages 
thrown by the 4D server. Unfortunately all these messages are not logged into 
a file by 4D, so I have to go the way via application start.

Theoretically it could be a problem with the interactive services if you use 
them. These services are more and more restricted by Microsoft. We don't use 
them.

Finding the real cause of the problem is rather difficult or even not 
possible. If you restarted the service and all was going well there isn't any 
chance to get the cause. You can try to have a look at the Windows Eventlog 
but the messages by 4D are mostly not helpful.

Regards
Lutz
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