Hey, Im getting this error when I run a new flow on Prefect cloud.

Unexpected error: TypeError("cannot pickle '_thread.lock' object")

I used is_serializable before registering the flow and got True. Any ideas on how to tackle this? Thx

This is something like you are returning an object in a task that can’t be serialized. You can test using

cloudpickle.dumps(obj)

to test it. You can also turn off

checkpointing

with

checkpoint=False

in the task

Yeah I’m familiar with this error - just not sure if thats the case here. Can I share some code privately so you can take another look?

Yeah sure DM me

oh.. I got the same error at my code for define the flow. Where can i adjust the 'checkpoint' parameter? @Kevin Kho