split order shipping and paiement methode

Hello,

i’m facing infront of an issue wich i can’t understand how to solve.

i have a woocommerce store wich sell some products from theprintfull.

they have a pluggin to communicate between woocommerce and they platform.

untill now all works pretty fine, people can buy products, the paiement is correctly setted up and also a shipping methode(theprintfull have a plugin for woocommerce for automatically calculate the rates).

now i would like to use another platfort wich have also a woocommerce plugging wich correctly communicate with the site.

my issue is:

when i combine the diffirents products in my cart i got an error 3004 Product not defined(apparently this is the error comming from the printfull pluggin)

so i’ve installed the advanced shipping for woocommerce and add a rule and a shipping rate based on a product class.

i changed the product class for 1 items to match the condition but still have the same result as before.

so what to do to splitt items correctly for diffirents platforms?

2nd question.

there is also a paiement split need, how that work? people pay let’s says by paypal and then 2 API calls will be maded to diffirents VEndors platforms or do i need to tweak the order to also plit that?

if i’m not clear sorry about that.

in advance many thanks for any ideas or solutions.