Account Calculations; improved the error message if an overriding Regular Payment of $0 occurs on the maturity date

When calculating the Loan Payment, and there is an Overriding "Regular" Payment on the date the Loan matures it will fail to calculate. This is because the Loan would actually finish early, i.e. have a zero balance.

The message that displays in this scenario has been improved to include:

Failed to calculate Account.

The Payment value cannot be calculated. Reasons for this include:

1. The Balance Payable is spread over too many Payments.2. The Final Payment occurs on an Overriding Payment date.3. The Final Payment date does not coincide with the Maturity date.

Consider:

1. Decreasing the Number of Payments. 2. Changing the Payment frequency. 3. Changing the First Payment Period to 'Standard'.4. Reviewing Overriding Payments.5. Using a Balloon Payment.