Troubleshooting
"Nothing to connect" — no DOP Network set and no Add Linked SOPs rows. There is genuinely nothing to write to.
"No FLIP Solver found" / "No FLIP Object found" — three causes. Discovery looks at the dopnet's direct children, so a solver inside a DOP subnet is missed. Or it is a SOP FLIP setup (see below). Or the path points somewhere unexpected.
"The DOP Network path does not resolve" — the path points at a node that does not exist. Distinct from an empty path, which is a valid SOP-only setup.
I use the SOP FLIP nodes — not supported directly. What works: leave DOP Network empty and add Add Linked SOPs rows for your flipcontainer and flipsolver SOPs, which carry particlesep and gridscale under those names. They hold those values independently, so you need a row for each. Substeps, CFL and the bounding box cannot be driven this way.
The container box vanished — guide geometry only draws while its node is current. Select the controller again.
Connect took over an expression I wrote — by design, and it said so in the report. Untick that parameter's Link checkbox to leave it alone. Unlink is the conservative direction and would have left yours alone.
A Linked SOPs row says "NOT FOUND" — the named parameter does not exist on that SOP, usually a node-version difference. Hover the parameter in the SOP's own panel to get its internal name.
Unticking Link switched my parameter off — it did not. Link only decides whether Connect includes it.
Status is out of date — it records the last Connect or Unlink. Press either to refresh.
Time Scale slowed something that is not the fluid — expected. It scales the whole DOP Network.
The node is not in the Tab menu — check the .hdalc is in Documents/houdini22.0/otls/ and that you have refreshed asset libraries. If Houdini refuses the file, check your licence: .hdalc is Indie/Apprentice only.
Still stuck? Find me on the JVtools Discord — the invite link is in the Utilities folder on the HDA node.