Hi Jerome,
The missing products belong to the same categories as the products actually included in the feed, so it did not feel like this was the common denominator for the missing products.
For example, the VITA category is missing
www.belysningsimporten.se/inomhusbelysni...eos-medium-lampskarm
www.belysningsimporten.se/inomhusbelysni...m-ljusbrun-lampskarm
www.belysningsimporten.se/inomhusbelysni...-eos-large-lampskarm
And in the same category, for example, this one is included
www.belysningsimporten.se/product/17633-vita-eos-mini-lampskarm
I now see that the problem is the canonical url that is created automatically, "inomhusbelysning" is no category in hikashop, just a collective name in our top menu. If I change the canonical url for the missing products, they will be included in the feed.
As it is now, the canonical url is chosen depending on which category they first appear in, if I have not gotten it wrong. Is it then possible to either adjust the google plugin to include these "categories" or control which url becomes canonical url automatically, for example /product/17633-vita-eos-mini-lampskarm instead of /inomhusbelysning/taklampor/product//product/17633-vita-eos-mini-lampskarm or whatever it happens to be for each new product.
Regards
Henrik