On Thu, Oct 30, 2025 at 12:49 PM Sven Schreiber <sven.schreiber(a)fu-berlin.de&gt; wrote: <hansl> open inven.gdt L = cinven r3 # error: symbol 'SERIES' invalid in this context </hansl> If I pre-prend the explicit "list" keyword, then it works. Also if L already exists. That has "always" been the case. Space-separated series names are not acceptable when creating a gretl object unless we know that the intended output type is a list, so we insist that is specified, by prepending "list" to the command or in case a list of the same name already exists.