I'm trying to create a large number of POP networks, each using unique source geometry. I gave it a try using the ForEach SOP to create sweep geometry using a passed-in curve and use this geometry as a POP source. In my experiment (attached) only the particles at grid point 0 flow freely. The particles at 99 also flow a bit. All of the other POPs are generating particles but after a brief surge on frame 1 they stop.

I simplified it by just creating a POP in the ForEach, but the source at grid point 0 didn't generate particles.

I'm using Houdini 11.0.504 on 64-bit Ubuntu 10.04.

I'll submit a bug if someone can reproduce it.

If there is a workaround or a different approach please let me know.

You cannot copy POPnetworks.
I forgot the exact reason but there's a discussion somewhere on odforce explaining this. Most likely a POPnetwork being a closed context and not a SOP.

A foreachSOP is something like a fancy copySOP IMO - that's why I'd expect this approach to fail too.

Thanks. I looked about in the docs/tutorials before posting and didn't find a mention but it seems reasonable. I'll look at another way to do this….

Here is example.. not guaranteed to be the best way, though.