Sheldon has a great look at how the Dynamics GP Word Template for Upgraded SOP Blank History Invoice Confounds people, including me some days.
Dynamics GP Word Template for Upgraded SOP Blank History Invoice Confounds – Etelligent Solutions-
Sales, Purchasing & InventoryExcel & OfficeInstall, Upgrade & Admin
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.