Diagnosis
The document you want to reverse (document &V1&) belongs to aninstallation group. It is connected to the primaryinstallation document &V2&.
In this case, the complete installation group, that is, all documentsconnected to primary installation document &V2&, and document &V2&itself, if necessary, must be reversed together.
However, an error occurred during the reversal of document &V1&. As aresult, the installation group cannot be reversed.

Procedure
Correct the error in document &V1& and start the reversal again.