Do not use
the CPORT and CIMPORT procedures for regressing a SAS file to a previous
release. You will experience errors when you try to import the transport
file. For more information about transporting files, see
Moving and Accessing SAS Files.
If a SAS 9 file is created
under a 32–bit platform for Windows, then the file is fully
compatible in a Version 7 or 8 session as long as you do not use any
new SAS 9 file features that are not supported under Version 7 or
8. SAS 9 files are not supported under Version 6 but are usable after
regression to Version 6 format.
To learn about these
compatibility issues and the best methods for regressing a SAS 9 file
to a previous release, see “Using a SAS 9 File Under a Previous
Version of SAS” in the Migration focus area at
http://support.sas.com/migration/planning/files/regression.html.