Are there any limits on what types can be parameters for a flow (or subflow)? I am trying to pass a pandas dataframe from one flow to another, and I get a pydantic error

RuntimeError: no validator found for <class 'pandas.core.frame.DataFrame'>

, so I tried to use

validate_parameters=False

in the flow annotation, but it made no difference. What am I doing wrong?

You have a code snippet I can try?

Can you try upgrading to the latest 2.0 version? we had an issue with this but it got fixed just yesterday https://github.com/PrefectHQ/prefect/issues/5663

Fixed on v2.0b11, thanks 🙂