Child Orders Start date in Collective Order

Hi Friends,

We are using collective order scenario and forward scheduling scenario, Lets say we have 1 header and 3 child order. Now our client wants the same start date for all the child orders (even if the lead time is diff for all the child orders).

But actually it is doing backward scheduling taking the start date of the header order as finish date.

i have tried OPU3 and OPU5 but its not working out.

Please let me know the solution.

Regards,

Solomon