In 7.2, the limits on the length of object names increased from 155 to 180 bytes. The increase might cause DCM problems for a DCM cluster that contains 7.2 databases and 7.1 or 7.0 databases. For example, a 7.2 database that contains object names of 156 bytes or higher is incompatible with a 7.1 or 7.0 database with object names set to a maximum of 155 bytes. Therefore, in a 7.2 or higher database that participates in a DCM cluster with 7.0 or 7.1 databases, set the maximum object name length to 155.
How to set this option: Model object attribute