When setting up a subscription, if you select "Keep issue number" for irregular issues and then mark some issues as "Not published" when testing the prediction pattern, Koha will remember to account for that when generating new issues around those unpublished issues. However, there's no way to make the pattern test show you how that will actually play out. Unpublished issues are never reflected in the numbering pattern test. It'd be great to have a way to re-generate the predicted numbering pattern with the Not Published issues reflected. Maybe a little "Update" button under the predicted pattern that one could click after checking the relevant boxes?
(In reply to Andrew Fuerste-Henry from comment #0) > It'd be great to have a way to re-generate the predicted numbering pattern > with the Not Published issues reflected. Maybe a little "Update" button > under the predicted pattern that one could click after checking the relevant > boxes? +1 I've also linked bug 17656 as see also.