SAP Message 7Q629 - ... No numbering group has been assigned to company code & for class &

Diagnosis
A numbering group has not been assigned to this combination of companycode and numbering class.
Withholding tax types exist that are relevant to numbering. The systemcannot determine a certificate number because the Customizing settingsare incomplete.

System Response
Payment cannot be made.

Procedure
Assign a numbering group to the combination of company code andnumbering class.