Prtg Update History Does Not Contain Any Entries

Make a small, inconsequential change to the sensor settings (e.g., add a tag or change the scanning interval slightly) and save it. Once the sensor reloads, check the Update History tab again. This action should generate the first entry, confirming the logging feature is working.

PRTG stores configuration data and history in different locations depending on your setup. If the Core Server is having trouble writing to the configuration file ( PRTG Configuration.dat ) or the database is acting inconsistently, logs may fail to write. prtg update history does not contain any entries

The PRTG Configuration.dat file stores various state information. If the section tracking updates is corrupted, the UI may show nothing. Make a small, inconsequential change to the sensor

| Cause | Explanation | |-------|-------------| | | A brand-new installation has no update history yet. | | Manual update without installer logging | Some manual ZIP updates don’t write to the history file. | | Corrupted PRTG Update History.dat | File exists but is unreadable. | | Permission issue | PRTG server service can’t read/write to the file. | | Upgraded from very old version | Very old versions didn’t track history in the same way. | PRTG stores configuration data and history in different

Occasionally, specific versions of PRTG may contain bugs that prevent the UI from populating the history tab, even though the logs exist in the backend.

⚠️ Only do this for cosmetic reasons – it doesn’t affect PRTG’s operation.

The most common and benign reason for an empty history is simply that the sensor is new.