It appears that the DESELECTNOMATCH option is ignored when a selection is performed with a pre-defined filter. If I Select ALL then Select DESELECTNOMATCH "Some Filter" FILTER where the pre-defined "Some Filter" matches a subset of the selected items, all items remain selected.
Is this a limitation or a bug? If it is a limitation then this should be documented in the description of DESELECTNOMATCH in the Help file.
Regards, AB