# Rasa-core: 'action\_default\_fallback' triggered for valid input

**URL:** <https://forum.rasa.com/t/rasa-core-action-default-fallback-triggered-for-valid-input/23764>\
**Category:** Rasa Open Source\
**Created:** [January 21, 2020, 6:53am UTC](https://forum.rasa.com/t/rasa-core-action-default-fallback-triggered-for-valid-input/23764 "2020-01-21T06:53:26Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![madhanaravind](https://avatars.discourse-cdn.com/v4/letter/m/f19dbf/32.png) [@madhanaravind](https://forum.rasa.com/u/madhanaravind)\
**Post date:** [January 21, 2020, 6:53am UTC](https://forum.rasa.com/t/rasa-core-action-default-fallback-triggered-for-valid-input/23764/1 "2020-01-21T06:53:26Z")

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I have created bot using rasa-core working fine for below story.

```
User: Hi
BOT: Hi, How are you?
User: fine
BOT: How can I help you?
User: what is the weather today?
BOT: In which location do you want to know?
User: London
Bot: It's cloudy with 22 degrees during day time.
User: Thanks
Bot: Thank you

```

I have an issue if I am trying to give valid input after invalid input triggers ‘action\_default\_action’.

```
User: Hi
BOT: Hi, How are you?
User: fine
BOT: How can I help you?
User: what is the weather today?
BOT: In which location do you want to know?
User: Thanks
Bot: Sorry, I can't understand (default fallback action given in policy)
User: London
Bot: Sorry, I can't understand (default fallback action given in policy)

```

How can I make a bot to understand that input is valid for previous question?

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**Author:** ![amn41](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/amn41/32/20_2.png) [@amn41](https://forum.rasa.com/u/amn41)\
**Post date:** [January 21, 2020, 10:44am UTC](https://forum.rasa.com/t/rasa-core-action-default-fallback-triggered-for-valid-input/23764/2 "2020-01-21T10:44:56Z")

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hi @madhanaravind - welcome to the forum.

Can you please run the bot with `rasa shell --debug` ? that should show why the fallback is triggered

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**Author:** ![madhanaravind](https://avatars.discourse-cdn.com/v4/letter/m/f19dbf/32.png) [@madhanaravind](https://forum.rasa.com/u/madhanaravind)\
**Post date:** [January 22, 2020, 2:10pm UTC](https://forum.rasa.com/t/rasa-core-action-default-fallback-triggered-for-valid-input/23764/3 "2020-01-22T14:10:05Z")

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Hi @amn41, I got below response

```
2020-01-22 19:32:47 DEBUG rasa_core.policies.memoization - Current tracker state [{'intent_thanks': 1.0, 'prev_action_listen': 1.0}, {'prev_utter_location_name': 1.0, 'intent_thanks': 1.0}, {'intent_greet': 1.0, 'prev_action_listen': 1.0}]
2020-01-22 19:32:47 DEBUG rasa_core.policies.memoization - There is no memorised next action
2020-01-22 19:32:47 DEBUG rasa_core.policies.form_policy - There is no active form
2020-01-22 19:32:47 DEBUG rasa_core.policies.ensemble - Predicted next action using policy_2_FallbackPolicy
2020-01-22 19:32:47 DEBUG rasa_core.processor - Predicted next action 'utter_default' with prob 1.00.
2020-01-22 19:32:47 DEBUG rasa_core.processor - Action 'utter_default' ended with events '[]'
2020-01-22 19:32:47 DEBUG rasa_core.processor - Bot utterance 'BotUttered(text: I am not sure what you're aiming for, data: {
  "elements": null,
  "buttons": null,
  "attachment": null
})'

```

Please let me know the feedback.Thanks

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<div class="post-metadata">

**Author:** ![amn41](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/amn41/32/20_2.png) [@amn41](https://forum.rasa.com/u/amn41)\
**Post date:** [January 22, 2020, 2:29pm UTC](https://forum.rasa.com/t/rasa-core-action-default-fallback-triggered-for-valid-input/23764/4 "2020-01-22T14:29:06Z")

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from the debug you can see that

` There is no memorised next action`

this means that the conversation you are testing is not present in your training data (up to max\_history)

I would suggest adding the [augmemo policy](https://rasa.com/docs/rasa/core/policies/#augmented-memoization-policy) or [embedding policy](https://rasa.com/docs/rasa/core/policies/#embedding-policy) to your config.yml so that Rasa can figure out what to do

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<div class="post-metadata">

**Author:** ![madhanaravind](https://avatars.discourse-cdn.com/v4/letter/m/f19dbf/32.png) [@madhanaravind](https://forum.rasa.com/u/madhanaravind)\
**Post date:** [January 28, 2020, 10:16am UTC](https://forum.rasa.com/t/rasa-core-action-default-fallback-triggered-for-valid-input/23764/5 "2020-01-28T10:16:02Z")

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@amn41 Thanks. Working fine now.