Skipping the base implementation of ExpireDownStreamObjects() stops component from recomputing with ExpireSolution(true)

Grasshopper Developer
1

As the title says, skipping the base implementation of ExpireDownStreamObjects() by doing something like:

protected override void ExpireDownStreamObjects()
    {
        if(false_if_something_happens)
        {
            base.ExpireDownStreamObjects();
        }
    }

will skip recomputation even if SolutionExpired(true) has been called before.

Is there something that one needs to implement in order to successfully stop Downstream Components from expiring?

P.S. I have tried scheduling a solution, but that hasn’t worked either.

2

Well, if you want to not expire downstream objects, then that is the correct method to override.

In a GH_Component, the base method does nothing more than calling param.ExpireSolution(false) on all its outputs. What class are you inheriting from exactly?

3

I’m using the standard Grasshopper Template for Visual Studio, so I’m inheriting from GH_Component.