Got it — when the Task Runs tab says “No task runs” and logs aren’t grouped by task, it usually means no task runs were created for that flow run. Quick checklist (Prefect 3.x): - Are you actually using

@task

? If all your work is done inside the

@flow

body or in plain functions, there won’t be any task runs to show. - Are tasks called inside a flow? Calling a task outside a

@flow

won’t create a task run. - Using subflows? A

@flow

called from another

@flow

is a subflow — it creates a nested flow run, not a task run. The Task Runs tab will be empty unless you also have `@task`s. - Using

get_run_logger()

? Call it inside a

@flow

or

@task

. Outside a run context it won’t attach to a task/flow. - Using

print

? Prints are not logged unless you set

log_prints=True

on the flow/task. Minimal example that will produce task runs (and task-level logs):

from prefect import flow, task, get_run_logger

@task(log_prints=True)
def transform(x: int) -> int:
    logger = get_run_logger()
    print("captured print from task")
    <http://logger.info|logger.info>(f"transform got x={x}")
    return x + 1

@task
def finalize(y: int) -> None:
    get_run_logger().warning("finalize starting")
    # do something

@flow(log_prints=True)
def my_flow():
    get_run_logger().info("flow started")
    a = transform(1)        # creates a task run
    finalize(a)             # creates a task run
    print("captured print from flow")

if __name__ == "__main__":
    my_flow()

Common anti-patterns that lead to “No task runs”:

from prefect import flow, get_run_logger

def do_work():  # No @task here → no task run
    logger = get_run_logger()  # Not in a run context → not attached to a task
    <http://logger.info|logger.info>("work")         # May not show as a task log

@flow
def only_flow():
    # All work here with plain functions/prints
    do_work()
    print("not captured unless log_prints=True")

Docs: - Add logging in Prefect 3 - Source for tasks (for reference): prefect.tasks If you can share a small snippet of how your flow and tasks are defined (especially where you call

get_run_logger()

and whether you use `@task`/`@flow`), I can pinpoint exactly why your task runs aren’t showing.