Many of the options of the PL/I ENVIRONMENT attribute affecting data set structure are not needed for workstation VSAM data sets. If you specify them, they are either ignored or are used for checking purposes. If those that are checked conflict with the values defined for the data set, the UNDEFINEDFILE condition is raised when an attempt is made to open the file.
The ENVIRONMENT options applicable to workstation VSAM data sets are:
BKWD
CONSECUTIVE
CTLASA
GENKEY
GRAPHIC
KEYLENGTH
KEYLOC
ORGANIZATION(CONSECUTIVE|INDEXED|RELATIVE)
RECSIZE
SCALARVARYING
VSAM
For a complete explanation of these ENVIRONMENT options and how to use them, see Specifying characteristics using the PL/I ENVIRONMENT attribute. In addition to this list of ENVIRONMENT options, there is a set of options that can be used with a DD statement, see Specifying characteristics using DD:ddname environment variables.