Network Navigator Trace Upstream/Downstream does not return any elements.
When using Network Navigator to trace elements upstream or downstream from a certain point in the system there aren't any elements found.
Defect #434496 was created to address this.
To prevent this from happening in the future either download and install the latest version of WaterGEMS or apply the latest patch set for version 08.11.06.58 (dated January 28th, 2016).
Cumulative patch sets for Hydraulics and Hydrology products
How can I find out when a new version or patch is released for a Hydraulics and Hydrology product?
How do I select all elements upstream or downstream of a certain point?
How to Download Bentley Hydraulic and Hydrology Software