It appears that NCM is exiting the session before if can pull the running configuration.
Resolution
To resolve the issue please complete the following.
1. Log into the Combo or Device server with root privileges that is associated with the Dell Powerconnect device. 2. source /etc/voyence.conf 3. Goto to $VOYENCE_HOME/custompackage/dell/powerconnect/pull.inc if the file or directory doesn't exist please copy it from the $VOYENCE_HOME/package/dell/powerconnect directory. 4. Please go to line "exitEnableMode(session)" and comment it out and save the file. 5. Complete a "service vcmaster restart" to apply the new changes.