Specctra fanout problem..

[Batke]

i have 3 bga ic:

1. comp. U1 532 pins, 0.8mm pitch (need to use via1)
2. comp. U2 357 pins, 1.27 mm pitch (need to use via2)
3. comp. U3 256 pins, 1 mm pitch (need to use via3)

rest of board need to use via4.

how to tell specctra fanout with this rules and then to route board with via4 ?

 

[shaul]

i have 3 bga ic:

1. comp. U1 532 pins, 0.8mm pitch (need to use via1)
2. comp. U2 357 pins, 1.27 mm pitch (need to use via2)
3. comp. U3 256 pins, 1 mm pitch (need to use via3)

rest of board need to use via4.

how to tell specctra fanout with this rules and then to route board with via4 ?

you have ti load the board into spectra and sellect u1 for funout.
then sellect via 1 for funout and run the funout only for the sellected item.
then select u2 for funout with via 2 and run, and so on.
for the rest of the board select via 4 and run.
you have to do it step by step.

 

[Serg_SV]

If you write
unselect all via
select via via4
then, all via will disable and only via4 you can use in your project.