Hi, is there a way to know the list of cells composing a combined library? That is, we suppose to have two libraries: DEFINE TEST_LIB LIBS/TEST_LIB ASSIGN TEST_LIB DISPLAY Invisible DEFINE TEST_LIB_REF LIBS/TEST_LIB_REF ASSIGN TEST_LIB_REF COMBINE TEST_LIB Where TEST_LIB_REF is originally empty and only contains cells coming from TEST_LIB. Library manager only display TEST_LIB_REF. The question is, is there a way through skill commands to know all the cells displayed in TEST_LIB_REF? If I do: Lib = ddGetObj(“TEST_LIB_REF”)~>cells I obtain “nil”. Regards, Camelot