The
installation process for a maintenance release uses the date-and-time
stamps for some non-versioned files to determine whether a file needs
to be updated. The date-and-time stamp for an installation of SAS
9.2 (TS2M2) is February 20, 2009. If you copied installations or modified
these date-and-time stamps in any way, then the maintenance release
might not install properly. To modify the date-and-time stamps in
UNIX operating environments, see
Modifying the Date-and-Time Stamps for Non-Versioned Files.