SITE COLLECTION WITH MEMBERS ERROR

hi Dear one's

i am trying to collect the sites only with members(refer snap) but i am unsucessful in doing it so. this below syntaxes i have used

syntax-VAR !ABC2 EVAL NAME FOR ALL SITE with matchwild( members of site,'*unset*')

error-(2,462)   TYPE MISMATCH: illegal argument type for MATCHWILD function (two, three or four text arguments expected)

VAR !ABC2 EVAL NAME FOR ALL SITE with matchwild( members eq unset)

error- Enter any valid element type or expression for this field

please anyone can guide me into this.

thanks in advance

regards