Do not use
the CPORT and CIMPORT procedures for regressing a SAS file to a previous
release. You 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.