Hi,
I thought this has been fixed but it seems a comment causes:
failed to apply settings: Ambiguous return type! Use 'string()' or another function from the "Convert Type" category to specify the return type.
// Filter identical URLs whos lastmod date is older or equal
join("$URL$ = \"", $URL$, "\" AND $lastmod$ <= \"", $lastmod$, "\" => TRUE")
Removing the comment make the node executable:
Best
Mike