Ritchie, the "MaxHistoricArchiveFiles" parameter is working well in the version 1.5.90.0, but not the "ArchiveOffloadLocation" and "ArchiveOffloadThreshold". The openPDC isn't moving the historic files to the "ArchiveOffloadLocation" when the disk reaches "ArchiveOffloadThreshold".
 
In my openPDC, the historic is located in a partition different from the operating system ("FileName" = "d:\openpdc\archive\ppa_archive.d" in the <ppaArchiveFile> section of the "openPDC.exe.Config"). Could it be a problem?
 
Could you confirm if this feature is enable?
 
Thanks!