Kiwi Syslog server - unable to archive any more


we are running Kiwi Syslog server for years and everything was working perfectly. But the last two months' dated logs are not compressed anymore. in dated log I see file *.zip and *.txt.001 but same size as original.

I manually trigger the scheduled task and I received this error:

Task engine aborted with error. At least one "Skipping file" event was triggered because an error prevented a file from being processed (syslogd_task engine.exe 2.5.169)

Log files are quite big from 5-10GB. but before everything was working.

Please help,