Invoices of the type 'Group by Bill To' can contain multiple cases. These invoices should not be able to be printed as a standard invoice in a single case. To comply with this:
An error message will be given when printing a grouped invoice in the individual Case/Account Tab:
When the option - 'Invoices: Standard' is selected in Reports/Invoices, grouped invoices will not be displayed when clicking 'Build'.
A grouped invoice can be deleted after confirmation as it may include other cases.