Pre-Evaluating Nodes Downstream

[jamesearnest244]

Here's a tricky one - I need to modify the value of a parameter, based on an attribute that only gets created later on downstream. I want the parameter to default to 0, but if said attribute exists later on downstream, then update this value accordingly.

To make things harder, the parameter lives in a subnetwork, and the attribute gets created outside of it.

I basically need to put down a point expression in the parameter field, but have it evaluate according to a later stage in the network (even if it means pre-processing everything that happens in between and then coming back to modify the value).

Any help appreciated!

Edited October 2, 2021 by jamesearnest244