On our DMS we see, that for multiple elements no previous logfile can be opened in Cube when selecting "Open previous" .These elements run for many months now and the recent logfiles show only the logy of the last hours/days, depending on the quantity of log entries per element. The previous logfiles show the following:
<em>Logfile "Element Name" from agent "FQDN"... 2023/04/12 11:41:06.284|SLLog|ApplyLogLevels|CRU|-1|Log Levels: Info: 5; Error: 5; Debug: 5 (init) **********</em>
We also accessed the logfile directly on OS level and could see, that most logfiles with "BAK" extension have a size of 1kB with the same content shown above.
The DMS runs DM version 10.2.12 currently.
Is this by design or should we be able to see all previous logfiles (assuming the element is active for a while already and has an adequate number of log entries.
Dataminer keeps the logs for the current and previous runtime. For example, a DM restart moves the current logs towards the _BAK/previous logs.
Element logs are also kept for current and previous runtime. This goes for e.g. an element restart, but also a DM restart. So if the agent is restarted, then the current element log is also moved towards its _BAK counterpart.
As such, I'm guessing the agent got restarted at 12/04 ~11:41
If no element restart was done (as you mentioned), nor was the agent restarted, then you might want to grab a LogCollector package of the agent hosting this element and send it to techsupport@skyline.be.
The contents of C:/Skyline Dataminer/Recycle Bin will likely be useful as well.