The ISPF variables that
are specified by both ISPCSR= and ISPMSG= are set by the SAS VDEFINE
user exit whenever the exit finds an ISPF variable that has a zero
length, or whenever the SAS informat that is associated with the variable
finds the value invalid. SAS uses the VDEFINE user exit to define
variable-name as
a character variable length of eight, placing it in the pool of functions
that are automatically specified.
To display the current
settings of your ISPF options, use PROC OPTIONS GROUP=ISPF.