Leslie Vail is posting about an error that shows The Vendor ID is Missing or Invalid in Ethotec’s Commission Plan product. She is kind enough to provide a resolution.
Dynamics Confessor Blogspot: The Vendor ID is Missing or Invalid
Payables & ReceivablesMicrosoft & the GP Ecosystem
Archived post from 2011. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.