I trying to use your software PRTG network monitor. Some WMI sensors didn`t work normally, it stop with an error status with error code PE015. After moment that 60% of our sensors was crashed by this problem( we had 1600~ sensors for one probe) we try to create 2 probes for 250~ sensors for one and 600~ for second probe. But its not fixed the problem. Now its crashed on a new probes. We try to send WMI query via your WMI tester, and its work. Now we could stabilize sensors only by stop PRTG services for some minutes and run it again. Scanning interval -15 minutes.