Diagnosis
No InfoObject is assigned to field &v1& in target structure &v2&. Theautomatic transport connection occurred for this structure. However, thestructure itself is not transported, but rather the metadata exclusivelycan be transported, from which the structure can be subsequentlygenerated in the target system for the import. Therefore, the structurecan be exclusively created from fields, whose names are uniquelyassigned to an InfoObject.

System Response
The structure cannot be used as a target structure for transforming anInfoSpoke.

Procedure
For enhancing structure &v2&, exclusively use the field names from whichan InfoObject is uniquely derived. For example, you can find theInfoObject field names by navigating in transaction RSD1 to the SIDtable for an InfoObject. There you find the field name in the firstline.
Alternative, you can specify a structure in your namespace as a targetstructure that you can enhance, but have to also transport it yourself.