the maximum number of open hydraulic models allowed (5) has been reached

Question

Hi There, 
 
 I got this message in my model. Wondering if this has happened to anyone else and how does this affect the model and how to eliminate this?. 
 "the maximum number of open hydraulic models allowed (5) has been reached" 
 
 Thanks, 
 Dawina

Jonathan Smith · Answer

If you're using the current (10.08) version of a Civil product, there is currently a limit of five DGN's (containing Hydraulic models) that can be open at once - one in the current DGN, and four references. This limit is set by the OpenFlows functionality that is used to provide Hydraulics and Hydrology functionality in the Civil products. 
 You may be seeing this message if you have attached references that contain Drainage and Utilities data, and the DGN you are in also contains Drainage and Utilities data. If the current DGN contains Drainage and Utilities data, then when the product starts, the references are scanned to see if they contain Drainage and Utilities data. If they do, then they are loaded, so that the software can access the data for annotating, as part of a drawing production workflow. 
 Hopefully this will help you understand what the software is doing, and may help you to avoid the issue. 
 We are currently looking at whether the Civil products can override the 5 hydraulic models limit when references are attached.

Jonathan Smith · Answer

We changed the way that this functionality works in the 10.10.20 version of ORD. Before then, there was a limit of 5, then 10 references. There were performance implications to this, because the software was reading and extracting the databases from the references, and this could take considerable time to do. From 10.10.20, we don't read or extract the drainage and utilities databases in the referenced design files, so you won't get the message any more. This means that the properties in the databases are not available, for inspection or annotation, so what we've done is to store more properties on the graphics - more information on the nodes, conduits and catchments, and some results as well, like flow and capacity on conduits for example. This information is visible in references, and can also be used for annotation.

the maximum number of open hydraulic models allowed (5) has been reached

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