Dynamics GP – Clicking “Submit” on VAT Return doesn’t open HMRC login window and No Obligations Error

I recently encountered a couple of issues with the new Making Tax Digital functionality in the latest version of Dynamics GP 2016.

The first issue was when clicking “Submit” on the Dynamics GP VAT Return window the HMRC login window wasn’t opening. The HMRC_Log_in window in question is a IE type window as shown below

The second issue was occurring when trying to bring through the Obligations when creating a new VAT Return. At the end of the process the message “No Obligations found for the year 2019” occurred.

**What was very strange is the second issue also opens the HMRC_Log_in window and during this process the window opened fine? The client then entered their credentials into the HRMC_Log_in window and authentication was also successful however it was the final bit of the process that involved bringing through the Obligations that was failing?

As the first issue seemed easier to trace I focused my efforts on resolving this one in the hope it would also resolve the second issue.

When troubleshooting the first thing I checked was to ensure GP had been configured as per Microsoft’s guidelines outlined in this KB https://docs.microsoft.com/en-us/dynamics-gp/financials/uk-tax-mtd and this all checked out fine.

The next thing was to ensure the process worked on my PC with the clients data. I therefore created a test environment on my PC and both processes all worked fine. I therefore suspected it was an environmental issue on the clients system.

Next I logged onto the clients system and performed a Process Monitor trace when clicking “Submit” and found the following issue

I was getting a NAME NOT FOUND for the file GPConnNet.dll in the local GP folder just before calls to the VAT100ElectronicSubmission.dll

I checked the local GP folder and the GPConnNet.dll file didn’t exist. I know this is a shared component so I looked in C:\Program Files (x86)\Common Files\Microsoft Shared\Dexerity\v2.0 and found the DLL

Therefore I simply copied the file from the shared folder above to the local GP folder and now clicking “Submit” opens the HMRC_Log_in window and the client can submit the VAT return electronically as per the new HMRC guidelines. I also checked if the Obligations part worked and now this all works fine as well.

Unfortunately I don’t know why GP wasn’t working as the DLL doesn’t exist in my local GP folder either, and mine still works, so I suspect another environmental issue is in play that I didn’t get to the bottom of.

If anyone has any suggestions on this it would be much appreciated.

Thanks for reading

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