DLDISPCHG System Option: z/OS

Controls changes in allocation disposition for an existing library data set.
Valid in: Configuration file, SAS invocation
Category: File Control: SASFILES
PROC OPTIONS GROUP= SASFILES
Default: COMPAT91
z/OS specifics: All

Syntax

DLDISPCHG=AUTO | BYREQUEST | COMPAT91 | NONE

Required Arguments

When SAS is assigning a SAS library that the SAS job has already allocated as DISP=SHR, the DLDISPCHG option controls whether SAS re-allocates a library as DISP=OLD.

DLDISPCHG=AUTO
SAS determines whether to upgrade an existing DISP=SHR allocation based on all available information. This information includes the level of authorization with which the client user ID (if applicable) and the SAS session itself have to access the library. AUTO is recommended for SAS/SHARE servers.
DLDISPCHG=BYREQUEST
SAS upgrades an existing DISP=SHR allocation only if it is explicitly requested by DISP=OLD on the library assignment. BYREQUEST is recommended for single user SAS sessions.
DLDISPCHG=COMPAT91
SAS applies the same rules as specified in SAS Release 9.1.3 when upgrading an existing DISP=SHR allocation. COMPAT91 is the default.
DLDISPCHG=NONE
SAS does not upgrade an existing DISP=SHR allocation under any circumstances.