Underspecified HVAC network

[ashrae-bemp-1]

I am running the LEED PRM navigator and i am getting an error when running the system load calculations "Error: Underspecified HHVAC network."

I used the default baseline system and used a default system type for the proposed. I am brand new to VE and just trying to get my feet wet.

My only thought is that the generic system incorporates Energy recovery. However, due to the small size of the building it is not required and therefore checked no on the AHU System Parameters. could this be causing a conflict?

[JosephG]

I think that your error message is because the airflow network does not have sufficient information. I would suggest reading the ApacheHVAC manual, Appendix A "Rules for Air Flow Specification".