Unable to serialize value: X as type: X

[lfvjimisola]

Autorest (python) fails to serialize with the following error message:

Exception in thread ArrivalSequenceGeneratorThread: Unable to serialize value: [<topsky_stimulator.commands.feed.feeder_api.models._models_py3.AerodromeArrivalFlightSequenceData object at 0x7dfae0a5b0e0>] as type: '[AerodromeArrivalFlightSequenceData]'.

Any idea of what could cause "Unable to serialize value: X as type: X"?

[lfvjimisola]

Found the issue. Further down in the class hierarchy there was a attribute that should have been a List[X] but it was just X and hence the serialization didn't work. The error message was not propagated properly up.