when CONFIG= is specified as a
command line option, the file specification must be any valid ddname,
which must have been previously associated with an external file
using either a TSO ALLOCATE command or a JCL DD statement.
when CONFIG= is specified in a
configuration file, the file specification can be a ddname or a physical
filename. A physical filename can be the name of a sequential data
set or a PDS member, or it can be the name of a file in a UFS directory.
Details
The configuration file
can contain any of the SAS system options, including the CONFIG= option.
Note: Typically, CONFIG= is not
directly specified as a command-line option, but indirectly with SASRX,
SAS CLIST, or batch PROC parameters.