Hi, try:
-- create a decal object:
mydecal=CDecal name: "Testdecal"
-- print the include/exclude list:
mydecal.excludeList
-- create some node...
mybox=box name: "Testbox"
--- ... and add it to the node array:
appendifunique mydecal.excludelist mybox
-- create another...
my2ndBox=box name: "Anotherbox"
-- ... and add it to the array using its name:
appendifunique mydecal.excludelist $Anotherbox
--- see the updated excludeList:
mydecal.excludelist
-- list all properties of the decal object:
show mydecal
Good Luck