Hello everyone , i have deployed prefect cor on aws Ec2 instance and i have some problem running the flow on it.

Unexpected error while running flow: AttributeError("'Flow' object has no attribute 'slugs'",)
Traceback (most recent call last):
  File "/home/ubuntu/.local/lib/python3.6/site-packages/prefect/engine/flow_runner.py", line 240, in run
    parameters=parameters,
  File "/home/ubuntu/.local/lib/python3.6/site-packages/prefect/engine/cloud/flow_runner.py", line 277, in initialize_run
    tasks = {slug: t for t, slug in self.flow.slugs.items()}
AttributeError: 'Flow' object has no attribute 'slugs'

This is usually caused by version mismatches between your agent / Docker images and the version you registered your flow with; this attribute was introduced in Prefect core version 0.12.0.

Can you be more precise? i am new to prefect. My local prefect core version is 0.12.0 and on the EC2 server is 0.12.1

Hi Mac; apologies for the confusion.

flow.slugs

was actually introduced in 0.12.1. What’s happening is that the Flow is built and stored using 0.12.0 without a

slugs

attribute, and when it is run using a

FlowRunner

of version

0.12.1

that attribute is missing. If you upgrade your local core version to 0.12.1 the issue should resolve.

@Chris White Thanks, that resolved my issue. Thank you again!

Anytime! Glad I could help