Attribute Rule failing on Manhole creation in Stormwater
I've just deployed the Stormwater Utility Network and have been testing and I noticed that every time I try to add a manhole I get this error. I disabled the Structure-Junction - Create Manhole Channel attribute rule for the time now, but it would be nice to know how to fix this. I'm looking at the activevol field in devices subtypes and that isn't even a field being utilized as it has domain set up to it. Also, can someone explain to me why the thought process of having the manhole structure Junction, a Pipe Connection Device, and a Manhole Channel Device all at this location is necessary. Seams like a lot.
I've also found that I get an error message when utilizing the template BMP Boundary with centroid BMP Boundary with in the Editor map of the provided Pro Package with an association error message.
Also, can someone explain to me why the thought process of having the manhole structure Junction, a Pipe Connection Device, and a Manhole Channel Device all at this location is necessary. Seams like a lot.
This containment model provides a more accurate representation of a manhole and its internal components. A manhole is essentially a vault—a structure that contains other elements. In our model, the Manhole Vault is represented by the structure junction, which contains both pipe connections and a manhole channel.
Pipes entering a manhole do not connect to a single central point; they connect at the edges of the manhole. A typical manhole is about 4 feet in diameter, so attribute rules offset pipe connections by approximately 2 feet in either direction to reflect this reality. These pipe connections use associations with the manhole channel to create the link between them. Conceptually, the channel is a line across the bottom of the manhole, but we model it as a point because in some cases it must act as a controller in the Utility Network to model flow—and a controller cannot be a line.
This modeling approach also enables accurate 3D representation of each pipe connection’s elevation, which is critical for depicting slope and flow through the manhole. This level of accuracy is important for hydraulic modeling and maintenance planning, where precise elevation and flow control can impact system performance and operational decisions.
Below is a top-down diagram to help visualize this structure:
We understand this seems complex. For simplicity, we are developing a Stormwater Essentials model, which uses a single point to represent the manhole and connects pipes directly to it (to be released early next year). This approach is similar to what people were used to in the geometric network. While it is easier to understand, it is less accurate for detailed analysis. Ultimately, choosing which manhole model to use will be a business decision: do you need high accuracy, or do you need simplicity?
