MTD UK VAT Retrieve VAT obligations step failing after upgrading to PU45

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Posted on by Kauto

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Hi,

Our step for retrieve VAT obligations electronic message is failing after we upgraded to PU45 and enabled the security feature for MTD executable classes.

Steps taken:

Installed Electronic reporting addin

Updated the Electronic messages formats for MTD to the required latest versions.

Enabled the preview feature for executable classes to be used for certain web service calls to HMRC.

The system is now failing to connect to the portal to get the access code (one off for 100 days) and is giving the following error:

User input parameter 'ActionId' has not been found.

We encountered a problem. Please try again in a little while.

Can anyone assist here - I have tried looking at the Message Processing actions as I suspect there is a problem with the changeover to this function and the model mapping but I can't be sure what is the correct setup as the tech guides are very poor on the Microsoft website.

This is an urgent request for anyone that has done this before recently?

Thanks

Kauto

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Sathish Kumar Palan... 388 Super User 2026 Season 1 on at

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Hi

did you reimported latest MTD configuration package from LCS or GitHub ?

Thanks

Sathish

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Kauto 2,734 on at

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Hi Sathish

It was already there in the dataverse repo and I imported the latest microsoft models from there - they are all the recomended versions + 1 from the website documentation produced in June.

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H.M.Burhan 390 Super User 2026 Season 1 on at

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Hi Kauto,

Since the integration architecture between Dynamics 365 Finance and HMRC has changed in a recent update, you need to replace the Action type from Web service to Message execution level for those Message processing actions where Web service is currently selected.

After making this change, open Microsoft Edge in InPrivate mode to execute the process.

Cheers,

Burhan

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Kauto 2,734 on at

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Hi HM

It wasn't the ACTION TYPE that was wrong but rather the format mapping was still on the old models.

Fixed now and submission successful.

Thank you for the prompt.

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