Hello all I m getting this error when trying to create a tas

Question

Hello all I m getting this error when trying to create a task with custom object ```ValueError Only generic univariate typing List T type is supported ``` I tried to use the example in doc <https flyte 943 org readthedocs build projects cookbook en 943 auto core type system custom objects html>

Victor Gustavo da Silva Oliveira · Answer

In this case I adapted the example to create a custom object and I m trying to create a map task that receives a list of this objects

Eduardo Apolinario (eapolinario) · Answer

Can you share the code < Victor Gustavo da Silva Oliveira>

Victor Gustavo da Silva Oliveira · Answer

The custom class ``` dataclass json dataclass class Test custom object object flyte file FlyteFile test data str``` A snippet from the class ``` task requests=Resources cpu= 1 mem= 600Mi def test task file Datum gt float print file flyte file ``` Snippet from workflow ```all samples = map task sample task metadata=TaskMetadata retries=1 file=samples map task test task metadata=TaskMetadata retries=1 file=all samples ```

Samhita Alla · Answer

< Victor Gustavo da Silva Oliveira> which task is throwing the error And what s the type of `all samples` list elements

Victor Gustavo da Silva Oliveira · Answer

The error is coming from the latter map task and `all samples` is returning me a list of `Test custom object`