When computing a flushing run, the following error message:
"Object reference not set to an instance of an object."
First, upgrade to the latest version of WaterGEMS or WaterCAD. The steps to do this can be found at the following link:
Downloading OpenFlows | Hydraulics and Hydrology Software
If that doesn't help, please contact Bentley Technical Support
Reference # 638286
Error when running Flushing analysis: Reference to a deleted or inactive element of interest
Flushing in WaterGEMS/WaterCAD in SELECTseries 6 +