1001 – the ‘http://www.govtalk.gov.uk/CM/envelope:Key’ element is invalid – the value xxxxx xxxxx is invalid according to its datatype ‘string’

1001 – the ‘http://www.govtalk.gov.uk/CM/envelope:Key’ element is invalid – the value xxxxx xxxxx is invalid according to its datatype ‘string’ – the pattern constraint failed. ABS-30

Absolute Tax Online Filing Errors SA100, SA800, SA900

Check the UTR number entered on page 1 of the SA100 is showing a valid 10 digit number with no spaces.