Here is a comparison between the two SV-A reports if that helps:

SV-A with no warning:

SV-A with warning:

*Mike Campbell E.I.T., LEED AP O+M

*From:* Michael Campbell [mailto:mike at sustainablesolutionscorporation.com]
*Sent:* Friday, December 07, 2012 7:49 AM
*To:* equest-users at lists.onebuilding.org
*Subject:* Require outside air fraction?

Hi,

I?m working on a project with parametric runs. The model simulates fine
with no errors or warnings, but then in my parametric run I change my
PTAC?s to PSZ systems with an economizer and I receive the following error
messages:

Has anyone seen this before? I ran the model the other day with the same
parametric run, the only thing I changed was that I specified a Supply
kW/cfm.

Any help is appreciated.

*Mike Campbell E.I.T., LEED AP O+M