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# ask-the-community
a

Ailin Yu

11/22/2022, 6:31 PM
Hello! I have a workflow which chains together several sub-workflows, including two 
reference_launch_plans
and a 
dynamic
workflow. When I try to view this workflow in the Flyte console, everything shows up as unknown (Node ID’s, type, workflow/task name, etc.), and the graph doesn’t render. When I try to get execution details using 
flytectl get execution --details
, I get this error:
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{"json":{},"level":"info","msg":"Retrieved 1 executions","ts":"2022-11-22T10:25:18-08:00"}
Error: unsupported literal scalar type *core.Scalar_Union
{"json":{},"level":"error","msg":"unsupported literal scalar type *core.Scalar_Union","ts":"2022-11-22T10:27:16-08:00"}
Is what I’m trying to do here something that isn’t supported?
Ah also I’m using 
reference_launch_plan
here instead of 
reference_workflow
because I would get this error otherwise:
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Exception: Reference sub-workflows are currently unsupported. Use reference launch plans instead.
ERROR: 1
y

Yee

11/22/2022, 6:46 PM
could you paste the signatures of the code here?
that will help us repro/debug
a

Ailin Yu

11/22/2022, 7:13 PM
Sure! Just to check, by signature do you mean you’d like me to share the workflow or something more specific you had in mind?
y

Yee

11/22/2022, 8:05 PM
oh sorry missed this
yeah just the workflow and tasks… you can redact most of the code
at least the task code. but for the tasks it’s helpful to have the signature yeah - the input and output types
a

Ailin Yu

11/22/2022, 8:15 PM
gotcha can do! let me take a couple minutes to pull things together in a nicely formatted way
Sorry took a bit longer than intended — Is it okay if I DM you the code?
It’s a pretty large web
Edit: I found a much simpler example:
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@workflow
def test_workflow():
    lp = reference_launch_plan_1()
    wf = test_workflow()
    reference_launch_plan_1 >> test_workflow
This has the same behavior
And I found this is happening because of the 
reference_launch_plan
, when I remove the 
reference_launch_plan
the UI populates properly
So perhaps it’s a bug related to 
reference_launch_plan
?
And to further clarify, if I have a workflow that contains only 
reference_launch_plans
, most things in the UI render just fine (except for the graph). When I mix `reference_launch_plan`s with `workflow`s, everything shows up as unknown in the UI
y

Yee

11/23/2022, 1:50 AM
looking
yeah always feel free to dm code
so this is unrelated to Unions?
a bit worried about the 
unsupported literal scalar type *core.Scalar_Union
error
a

Ailin Yu

11/23/2022, 1:52 AM
I think that bug is separate from the UI bug now after I discovered this, but I believe I did find which subworkflow is causing that error and can have a look there
y

Yee

11/23/2022, 1:52 AM
that might be a red herring actually. @Prafulla Mahindrakar does flytectl not support displaying of unions?
not quite seeing this.
so for reference I’m running the following
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cookbook/ $ pyflyte -c ~/.flyte/config-sandbox.yaml register --version ref1 core/flyte_basics/hello_world.py
cookbook/ $ pyflyte -c ~/.flyte/config-sandbox.yaml register --version ref2 core/control_flow/sub_with_ref.py
on this https://github.com/flyteorg/flytesnacks/blob/sd-examples/cookbook/core/control_flow/sub_with_ref.py
so the first register command creates the launch plan, that the second register then uses.
message has been deleted
it’s a little inaccurate in that the top one is technically a launch plan not a “Sub-Workflow” but I think this was something that we decided to print instead a while back as a way of simplifying the experience
p

Prafulla Mahindrakar

11/23/2022, 5:56 AM
does flytectl not support displaying of unions?
@Yee I was going through the code and i couldn’t find we added support for these and structured data set. Created a ticket here to track this change https://github.com/flyteorg/flyte/issues/3094
a

Ailin Yu

11/23/2022, 6:49 PM
Interesting, that’s exactly the pattern that breaks for me, it makes my console looks like this
I have also found that if instead of doing 
reference_launch_plan
>> 
workflow
, I instead have 
reference_launch_plan
>> 
task
, the UI renders correctly again
y

Yee

11/23/2022, 7:01 PM
would you mind trying with the code from that branch and those commands?
just making sure to eliminate all possible variables.
i’m also on the latest version of everything - but i don’t think that matters, i don’t think i’ve seen a bug fix for subworkflow rendering in a bit but could be wrong
a

Ailin Yu

11/23/2022, 7:44 PM
Yes I’ll give it a shot! And yeah that’s a fair check, this is what I see in my Flyte console fwiw:
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UI Version 1.1.6
Admin Version 1.1.28-2-gf10a7f2
Ah yes upgrading to 1.4.0 fixed the problem! Sorry I should have checked this earlier 🙏 Everything looks wonderful now
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