SAP Message 50073 - Invalid source for required target element component &1.&2. &4

Diagnosis
An error has occurred that has prevented further processing. This ismost likely due to a Customizing error.
The following information should enable a specialist to locate theproblem so that it can be resolved more quickly.
The source of the obligatory target element component &V1&.&V2&is invalid or not available during container transformation.
Further information:
V4
Source element name or literal:
&V3&

Procedure
Contact your system administrator specifying the error situationconcerned.