Error - The total of Net value and VAT value on the header do not match the Gross value

This error is displayed when the Gross value does not equal the sum of the Nett value and VAT value on the invoice header. To resolve this, the invoice must be rejected (unmatching any matched orders first) back to Dimensions and the values corrected so that the Gross value is equal to the sum of the Nett value and the VAT value.