Issue overview

DesignSpecification:OutdoorAir:SpaceList with Controller:MechanicalVentilation results in zero requested OA flow rate in v24.2. In v25.1 it causes a crash, because it's calling Schedule::getCurrentVal with a null pointer.

• The basic problem is that Controller:MechanicalVentilation is set up to copy values from the DesignSpecification:OutdoorAir object(s) into the VentilationMechanical struct to do certain OA component calcs. This doesn't work for DesignSpecification:OutdoorAir:SpaceList. It needs a whole new approach to evaluate the OA requirements by calling OARequirementsData::calcOAFlowRate or similar function(s).
• Perhaps the whole DSOA:SpaceList approach needs to be revisited.
• And this is another use-case not covered by testing.
• @amirroth Would it be acceptable (possible?) to initialize schedule pointers to Sched::GetScheduleAlwaysOn(state) in the declaration? Not that it would fix the zero OA issue here . . .

Operating System (Multiple choices)

Any

Operating System Version

any

Version of EnergyPlus

25.1

Unmethours link or helpdesk ticket number

Helpdesk 16870

Defect file

EnergyPlusDevSupport/DefectFiles