Kepware 6.15 runtime closes by itself every 3-4 days, then needs a manual reopen

Hi all,

We are supporting a site where Kepware Server 6.15 (drivers V6.15.132.0, Modbus TCP) sends data to ThingWorx 10.2 over the Native Interface. We need some help with the points below.

What is happening
- The customer says Kepware closes by itself about every 3-4 days. Whoever sees it first opens the application again.
- While it is closed, no data from any device reaches ThingWorx. Store and Forward does not help here, as it runs inside Kepware.
- The longest case in the Event Log was on 10 Oct: runtime exit at 3:00:22 AM and next start at 9:04:15 AM (about 6 hours).
- In the log we see 7 runtime exits. Six of them restarted within 1 to 3.5 minutes.

What the Event Log shows
- Each exit is preceded by "Administrator configuration session ended".
- Then: "Runtime performing exit processing."
- On the day of the 6-hour gap, the reopen attempt logged: "Account '<account>' does not have permission to run this application." and then "Timeout waiting for server runtime to start."
- The customer says the application must be run as administrator, otherwise this permission error is logged.
- The same permission error appears on 8 different dates.