SAP Message 50078 - Target element object &1 cannot be generated

Diagnosis
An error occurred that prevents further processing. This is most likelydue to a Customizing error.
The following information should enable a specialist to locate theproblem so that it can be resolved more quickly.
The obligatory target element &V1& should be created duringcontainer transformation.
This object element can not be created.
Object type: &V2&
Key: &V3&

Procedure
Contact your system administrator specifying the error situationconcerned.