Unifier-Auto-Populate entire Detail Forms

Hi,

as your help in the past was really valuable and saved me a lot of frustration, I am asking you again for your help.

I have a Cost BP which is used for an initial calculation of a project budget and has 6 Detail Form Tabs. After this BP, a simple BP starts for some approval steps by the board and the nomination of the project team. After this two simple BPs, a new Cost BP starts to do a plausibility check on the calculation, add Cost items and so on.

My problem is, the detail forms of this last cost BP are empty. But I would need to have all line items and cost data from the first cost BP in this BP too. So I am searching for a way, to auto-populate this detail forms from the first cost BP.