Error when adding Power Automate into PowerApp

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Posted on by karimabdelrazek

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Hi Everyone,

My development has come to a practical standstill since yesterday. I am trying to add flows to my app and keep getting this message:

"The flow input and output schema cannot be represented in WADL. code: FlowWadlConversionNotSupported".

For the sake of this post, I will refer to a simple flow that is also causing this error. The flow starts with a PowerApps trigger and then initializes a variable using the "Ask in Powerapps" as its value.

I've tried rebuilding this flow a few times from scratch, but still the same issue.

Any ideas please?

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Answers (2)

JimSInAz 17 on at

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Re: Error when adding Power Automate into PowerApp

"Remember to also remove the maybe null values from the required section in your schema. "
THANK YOU!!!!!
gl_syedalhabshi 2 on at

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Re: Error when adding Power Automate into PowerApp

For me, the reason is because when I return to PowerApps, the schema I use contains empty array:

So when I use the "Generate from sample" feature... it detects the array datatype, however, there is no data type specified within the array.

So I just remove the properties since it is not required anyway. And it works.
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Heartholme 1,278 Super User 2024 Season 1 on at

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Re: Error when adding Power Automate into PowerApp

This will solve the issue:

https://powerpostal365.com/2023/10/04/how-to-handle-null-data-when-passing-json-objects-from-flow-to-powerapps/

✔ Marking my post as a solution not only confirms that your question has been answered, but also helps others find solutions to similar problems.
By doing so, you'll be making a valuable contribution to the community.

Best Regards
Heartholme
Sidhant_02 986 on at

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Re: Error when adding Power Automate into PowerApp

Hi @karimabdelrazek ,
Even I am facing the same issue and as you suggested to use the Power Apps V2 trigger which I did replace it with and tried adding the flow in my Canvas App still its giving me the same error.
I am trying to consume data using REST.

How can I resolve the above issue?.

Regards,
Sidhant.
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karimabdelrazek 292 on at

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Re: Error when adding Power Automate into PowerApp

Solved. Apparently there are TWO PowerApps triggers. I went into my flow, deleted the original PowerApps first step (trigger), and selected PowerApps option. Two triggers appeared, one with a (V2). Selected that one and all is good now.