Power Automate Flow error

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Posted on by naveens1

Hi,

I have created Power automate flow based on instance but getting following error while calling though PVA.

Attached is the screen shot for reference, kindly help in this regard.

Error:

Action 'HTTP' failed

Error Details:

Value cannot be null. (Parameter 'Cannot pass null model to Validate.')

Thanks,

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Answers (0)

naveens1 22 on at

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Re: Power Automate Flow error

Let say I created custom qna in language studio then how to integrate this in to Power Virtual Agents?
Do you have any documentation/link, if so please share.

Thanks,
naveens1 22 on at

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Re: Power Automate Flow error

body('HTTP')?['answers'] ----Apply to each
items('Apply_to_each')?['answer'] -------Set variable
items('Apply_to_each)?['Score'] -------Set variable2
variable('Score') -------Condition
variable('QnAAnswer') ---------Return values to Power Virtual Agents
naveens1 22 on at

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Re: Power Automate Flow error
Expiscornovus 31,711 Most Valuable Professional on at

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Re: Power Automate Flow error

Hi @naveens1,

Can you open your flow in edit mode and show/share a screenshot of the configuration you have in the Apply to each action and the return value to PVA action?
naveens1 22 on at

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Re: Power Automate Flow error

Hi, looks like flow ran successfully but still last component which is Return values to Power Virtual Agents is have some issue so kindly look in to it and help me how to tackle this one.

Thanks,
naveens1 22 on at

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Re: Power Automate Flow error

Looks like flow ran successfully but still last component - Return values to Power Virtual Agents have some issue, kindly look in to it and let me know how to tackle this one.

Thanks,
Expiscornovus 31,711 Most Valuable Professional on at

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Re: Power Automate Flow error

Hi @naveens1,

Apologies if my last answer was not clear.

My response was, yes integration between PVA and Language studio is possible (via for example the REST API). So, you don't have to choose between the two 😉
naveens1 22 on at

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Re: Power Automate Flow error

Hi,
So which one is better PVA or Language Studio, in terms of capturing sentence context, accuracy/confidence score?
Universal Sentence Transformer is also better in terms of capturing sentence context.
Expiscornovus 31,711 Most Valuable Professional on at

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Re: Power Automate Flow error

Hi @naveens1,

Do you mean using input from users in the chatbot to get answers from the knowledge base and sent them back to the chatbot conversation? If so, yes that should be possible as well with Language studio.

You could interact with that REST API with for example the HTTP action. You could use the input from the user from the Power Virtual Agent as value within the body of that HTTP request. Similar as in the screenshot of your opening post 😀

I would only use the When a Power Virtual Agents calls a flow trigger action, instead of the When a HTTP request is received action.
naveens1 22 on at

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Re: Power Automate Flow error

Hi, thanks for quick response!!
Now I have another question about is it possible to integrate Language studio with Power Virtual Agent?
If yes, then okay
if not, Then how to use PVA for chatbot?
I guess that PVA is much better than other options in Microsoft Services...