worked out a way around it, I made my initial discovery task catch all errors and simply made a return item that indicated the exception, then, in the following filter I removed those items.

Hi @Rob Fowler - it sounds like a

some_successful

task trigger would work here, set to

at_least=0

: https://docs.prefect.io/api/latest/triggers.html#functions

But the main issues was I didn't want to decorate the task because when I use the same task later I wanted it to have failures. Making it catch the failures and filter them out seems the correct model now I used it that way.

Ah I see @Rob Fowler, thanks for the update!