serialdriver.SerialDriverAdapter Error in System console

[spassmo]

I'm seeing the following errors in the System Console when a C/MRI node is configured with a serial connection.
Errors do not appear when a Simulated C/MRI connection is configured.
C/MRI does appear to be working normally despite errors.
Error started appearing in version 4.5.5

2016-11-14 23:44:15,369 serialdriver.SerialDriverAdapter ERROR - getInputStream called before load(), stream not available [main]
2016-11-14 23:44:15,369 serialdriver.SerialDriverAdapter ERROR - getOutputStream called before load(), stream not available [main]
2016-11-14 23:44:15,369 jmrix.AbstractMRTrafficController ERROR - Failed to start up communications. Error was java.lang.NullPointerException [main]

[bobjacobsen]

This is usually a configuration error and/or problem with the port hardware or driver. Do you have another connection besides C/MRI configured? E.g. does your preferences show two tabs under "Connections"?

[rhwood]

Closing since OP has not responded.

[spassmo]

Sorry I missed the question on this one. No there is only one connection tab.

I see this is also covered in:
C/MRI infrastructure code needs significant rework #2953