Remove Duplicate values in a variable

var !coll COLL all ATTA with matchwILD(NAME,'*SST*') EQ T FOR $!REF
DO !A FROM 1 TO !COLL.SIZE()
$!COLL[$!A]
VAR !HEIS NAME
!HEIA = !HEIS.BEFORE ('/DATUM')
!HEIB = !HEIA.BEFORE ('/SREF')
!HEIC = !HEIB.BEFORE ('.')



$P $!HEIC

[COLOR=#333333]How to remove the duplicate values in a variables ([/COLOR]$!HEIC[COLOR=#333333])[/COLOR]

var !coll COLL all ATTA with matchwILD(NAME,'*SST*') EQ T FOR $!REF
DO !A FROM 1 TO !COLL.SIZE()
$!COLL[$!A]
VAR !HEIS NAME
!HEIA = !HEIS.BEFORE ('/DATUM')
!HEIB = !HEIA.BEFORE ('/SREF')
!HEIC = !HEIB.BEFORE ('.')



$P $!HEIC

[COLOR=#333333]How to remove the duplicate values in a variables ([/COLOR]$!HEIC[COLOR=#333333])[/COLOR]