confidence bands for IRF's

[mzachlod]

Hello,
I would like to ask how to get the confidence bands (simulated, bootstrapped) for the impulse responses for the SVECM model calculated with CATS. I am using CATS menu - Misc > Structural MA model and I am getting graphs for impulse responses of each variable for every shock, but there are no confidence bands built in.
Your help will be really appreciated.
Magda