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```Traceback (most recent call last): File "/Use...
# ask-community
g
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Traceback (most recent call last):
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/prefect/client/client.py", line 591, in register
    prefect.serialization.flow.FlowSchema().load(serialized_flow)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/prefect/utilities/serialization.py", line 141, in load
    return super().load(data, **kwargs)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 723, in load
    data, many=many, partial=partial, unknown=unknown, postprocess=True
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 861, in _do_load
    unknown=unknown,
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 669, in _deserialize
    index=index,
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 493, in _call_and_store
    value = getter_func(data)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 662, in <lambda>
    val, field_name, data, **d_kwargs
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/fields.py", line 342, in deserialize
    output = self._deserialize(value, attr, data, **kwargs)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/fields.py", line 597, in _deserialize
    return self._load(value, data, partial=partial)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/fields.py", line 580, in _load
    valid_data = self.schema.load(value, unknown=self.unknown, partial=partial)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow_oneofschema/one_of_schema.py", line 122, in load
    data, partial=partial, unknown=unknown
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow_oneofschema/one_of_schema.py", line 176, in _load
    return schema.load(data, many=False, partial=partial, unknown=unknown)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/prefect/utilities/serialization.py", line 141, in load
    return super().load(data, **kwargs)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 723, in load
    data, many=many, partial=partial, unknown=unknown, postprocess=True
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 861, in _do_load
    unknown=unknown,
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 669, in _deserialize
    index=index,
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 493, in _call_and_store
    value = getter_func(data)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/schema.py", line 662, in <lambda>
    val, field_name, data, **d_kwargs
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/fields.py", line 342, in deserialize
    output = self._deserialize(value, attr, data, **kwargs)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/fields.py", line 597, in _deserialize
    return self._load(value, data, partial=partial)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow/fields.py", line 580, in _load
    valid_data = self.schema.load(value, unknown=self.unknown, partial=partial)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow_oneofschema/one_of_schema.py", line 131, in load
    result = self._load(item, partial=partial)
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/marshmallow_oneofschema/one_of_schema.py", line 148, in _load
    raise ValidationError({"_schema": "Invalid data type: %s" % data})
TypeError: not all arguments converted during string formatting

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "knack_facts.py", line 708, in <module>
    flow.register("PROJECT_FLOW")
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/prefect/core/flow.py", line 1372, in register
    no_url=no_url,
  File "/Users/gcoyne/miniconda3/envs/FLOW_NAME/lib/python3.7/site-packages/prefect/client/client.py", line 595, in register
    repr(exc)
ValueError: Flow could not be deserialized successfully. Error was: TypeError('not all arguments converted during string formatting')
c
Hi @George Coyne! This is definitely a new error for me — to start debugging, we’re going to want to focus on the output of 
flow.serialize()
for this flow.
i think the first thing we should try to do is recreate this locally somehow
Let’s start with this:
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import json

with open("debug.json", "w") as g:
    json.dump(flow.serialize(), g)
and then in a new process:
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import prefect
import json

with open("debug.json", "r") as g:
    flow_payload = json.load(g)

flow = prefect.serialization.flow.FlowSchema().load(flow_payload)
g
OK, I have the Flow
c
that didn’t produce an error?
g
It did not
c
would you mind DM’ing me the output of 
flow.serialize()
?
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