Diagnosis
You want to link a document of type &V1& to object &V2&.
Settings in Customizing (Document management -> Control data ->Document link) define which objects can be assign ed to documents ofeach document type.
Links to &V2& are not defined for document type &V1&.

Procedure
If this object has to be linked, contact your system manager. An entrymay have to be made for this object link.