Confused about getting archived products from matrixed builds

[Eric Vaandering]

I need some help. Here's what I've got:

I have a project (call it P1) that triggers additional projects (P2a, P2b, P2c) waits and fetches back their archived products through "Specific Build #" the "$TRIGGERED_BUILD_NUMBER_P2a" etc nomenclature.

The problem is with P2a. It's a matrixed build (running 1/10th of my unit tests) and the sub-projects are not 100% reliable. So I have it set to re-run the parts of the build that fail. But I don't see any way, for instance, to grab archive products 1-9 from the first build of P2a and product 10 (which was resubmitted) from the 2nd attempt.

P1 collects up all these products and analyzes them to give some information to the user.

Am I overlooking something?

Thanks.