On Mon, 15 Mar 2021, Sven Schreiber wrote: With quarterly AWM loaded, you can't create a monthly series. But you can get CAN (e.g.) as a monthly column vector: <hansl> open AWM.gdt smpl ok(CAN) --restrict matrix CAN12 = tdisagg(CAN, ,3, _(verbose=1)) </hansl> The "does not seem suitable" message needs revision, I guess. A series that's "suitable" for in-place disaggregation would be one that is of lower frequency than the current dataset, this being indicated by one or other of these patterns: * Repetition of low-frequency value per sub-period (e.g. an annual value appearing in each of the 4 quarters). * Value given for only the first sub-period (e.g. annual value appears only in Q1, with NAs otherwise). Allin