Most often the cyclic nature of the loop can be eliminated by reversing the direction of one of its links (i.e., switching the inlet and outlet nodes of the link). The Steady and Kinematic Wave flow routing methods cannot be applied to systems where a cyclic loop exists (i.e., a directed path along a set of links that begins and ends at the same node). The following links form cyclic loops in the drainage system. Missing or invalid pump curve assigned to Pump xxx.Įither no pump curve or an invalid type of curve was specified for a pump. Adverse slopes are permitted under Dynamic Wave routing.Ĭross section geometry was never defined for the specified link.Įither an invalid shape or invalid set of dimensions was specified for a link's cross section. This can usually be corrected by reversing the inlet and outlet nodes of the conduit (i.e., right click on the conduit and select Reverse from the popup menu that appears). Under Steady or Kinematic Wave routing, all conduits must have positive slopes. Invalid number of barrels for Conduit xxx.Conduits must consist of one or more barrels. The ground elevation assigned to a Subcatchment’s groundwater parameters cannot be below the initial water table elevation of the aquifer object used by the Subcatchment.Ĭonduits cannot have zero or negative lengths.Ĭonduits cannot have zero or negative roughness values.
Ground elevation is below water table for Subcatchment xxx. The properties entered for an aquifer object were either invalid numbers or were inconsistent with one another (e.g., the soil field capacity was higher than the porosity). Invalid parameter values for Aquifer xxx. The name of the element identified as the outlet of a Subcatchment belongs to both a node and a Subcatchment in the project's data base. The system could not open its Ordinary Differential Equation solver.Ī valid time step for runoff or flow routing calculations (i.e., a number greater than 0) could not be computed at some stage of the simulation.Īmbiguous outlet ID name for Subcatchment xxx. The internal solver for Kinematic Wave routing failed to converge for the specified link at some stage of the simulation. There is not enough physical memory in the computer to analyze the study area. APPENDIX E – Error and Warning Messages in the Engine of InfoSWMM H2OMap SWMM
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