upstream_tree_of failed

[20cents]

Hello,

I try to use the function upstream_tree_of followind this exemple: (Of course I change ids) https://greendelta.github.io/olca-ipc.py/olca/ipc.html#olca.ipc.Client.upstream_tree_of I've got this error: ERROR:root:Failed to get upstream tree: 400: invalid result reference: no ID

Exporting the calculate result with to_json() is ok.

I've tried with all archived beta versions of openLCA (Linux) With the last (2022-11-07) it's worst: to_json() is empty

Thanks for any help.