Invalid period key -VAT submission

[tuckerkhan]

Hi,

We're trying to submit our data online and this period it is failing with error code 400 Bad request, PERIOD_KEY_INVALID code and message of "Invalid period key" but the period key is the same format as we always use of month and date.

This is the response from our submission: }, "Response": { "Error": { "code": "400", "name": "BadRequest", "description": "Bad Request" }, "Content": { "code": "PERIOD_KEY_INVALID", "message": "Invalid period key" } } }

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[tuckerkhan]

we believe we found the issue. HMRC migrated us from a old back end to their new main frame on the same day we created the period and we picked up the old main frame key. Change the NAV period key in code and sent to HMRC again and it worked it out.