Node is being migrated to RHEL7 :
When pressing Reregister button the following error appears:
The Node migration is being performed prior to the OA Management Node migration.
Due to this fact, pre-migration action, which fixes incorrect package properties, was not completed.
Incorrect properties values do not allow node re-registration.
Fix incorrect values using the following script from the migration tool:
# /usr/local/pem/bin/actions_before_migration_to_rhel7.py --action fix_null_properties_values
Latest version of migration tools is available in the following article:
#130182 Migration of OA 7.0 Premium MN from RHEL6 to RHEL7