​@HoiIndikW the object connection transformation rules are define between 2 LUs (logical units) and It doesnt depend on the document class.

Also if you setup a rule between the Purchase order and manual supplier invoice, it will transfer all documents. maybe you might need to investigate the possibility to customize this. In core application this is not supported.

Else you need 2 rules from Purchase order confirmation and the supplier invoice to manual supplier invoice page, instead from purchase order. But you need to evaluate and decide whether it suits your business flow.

Pls refer documentation for more details.

…/Documentation/en//DefineSystemBasics/AboutObjectConnectionTrans.htm

...in addition to the answer from diwelk. To pass on only certain documents, you can also use an event action configuration. In this case, a further object link can be executed directly in the document revision under the desired condition. This increases flexibility.

Thanks ​@diwelk and ​@MikeCH for your inputs. 

​@MikeCH We also thought of creating a custom event/BPA to block transfers of Purchase order confirmation related document revisions from purchase order page to supplier invoice page. Could you please describe more about the event action configuration solution you have suggested? 

​@diwelk Another thing to add to the documentation perhaps?