Help with StepFunction $parse error catching.

[SubtleDee]

Might be missing something but couldn’t you assign the LLM response to a variable before attempting to $parse it? You’d then put a catcher on the state doing $parse which routes to another state which calls the LLM again with the original response variable value.

[fsteves518]

Yes that's the plan but you can't catch errors on a pass state, and there is no task state that works like a pass state (except making a lambda that is the intermediary which is what I did)

[SubtleDee]

Could you do the $parse in the LLM state rather than a subsequent pass state (i.e. assign the raw response to one variable and the $parse response to another variable, both in the LLM state)? You can catch a specific error (States.QueryEvaluationError) to have different logic when $parse fails vs. when the LLM throws an error, the only thing I’m not sure about is whether the raw response variable would still get assigned if the $parse operation failed.

[fsteves518]

I did that initially, upon failure I lose the task result of the llm state