Diagnosis
V2 role and letter entries are assigned to correspondence activityV1 for invoice printout. however, only one entry is allowed.
Contrary to the other correspondence applications, in invoice printoutthe recipient cannot be defined by the roles in the correspondenceactivity. Each invoice can include several agreements, and is onlycreated for the corresponding customer. Therefore, the correspondenceactivity is only used to choose the letter in the invoice printoutapplication.

Procedure
Assign exactly one letter to the correspondence activity inCustomizing. The "Role category" and "Role type" fields will not betaken into account for the invoice printout, and should remain blank.