Hello AutoGen_8255922

Where is your alarm history saved? also on X61?

Check if there are also the archive files from Alarm Logging

Bye Murof

Hi,

For February 18, the screenshot shows a shared memory file and a WAL file. This indicates that the logging stopped unexpectedly. The next log appears to start on March 5th.

However, there are several reasons why the contents of a folder might look like the picture. Removing the USB stick while logging is running will cause such a picture, but a damaged USB stick or a crash of the logger could also cause it.

Usually a trace log would help to find the reason, but the trace would have to be running before the problem occurred.

You mentioned that you are using WinCC Unified V18. You should make sure that you are using the latest image version. This can be the V18 Upd. 5 or the latest V20.

Kind regards
Stefan