Create Invoice with Line Item from a linked Product

[jass]

Hello all,

I am trying to create an invoice including line item using a process flowchart. In Object A a product is referenced, there is a price stored, which should be used.
Now an Object B is created, an invoice with the Line Item from the Product in Object A should be created automatically.

Unfortunately, it is not possible dynamically with the help of a task. Does anyone have an idea how it can be solved ?


Thanks