You may get this error in the Output Processer if you do not have any printers selected in Settings\User Preferences.
Go to Settings\User Preferences and select a printer for each output type.
Click OK and process output again. You should no longer get the error above.
Please reach out if any further assistance is required.
Helpdesk: 866.237.2878
Email Support: helpdesk@alpineitw.com