Hi Ruslan, I create a temp field like this fld = myDatabase.myReferences.createVarCharField("authorEditorSortMethod", 2000, EVFlag.fNone, "IFNULL(authors, IFNULL(editors,title))") and dispose of it later with myDatabase.myReferences.deleteField(fld) With b33 I get an error that deleteField does not exist. Is .dropField the new equivalent? Thanks, Jon