# EPANET: Warning Codes

Warning Codes

Code | Description
--- | ---
1 | System hydraulically unbalanced - convergence to a hydraulic solution was not achieved in the allowed number of trials
2 | System may be hydraulically unstable - hydraulic convergence was only achieved after the status of all links was held fixed
3 | System disconnected - one or more nodes with positive demands were disconnected from all supply sources
4 | Pumps cannot deliver enough flow or head - one or more pumps were forced to either shut down (due to insufficient head) or operate beyond the maximum rated flow
5 | Valves cannot deliver enough flow - one or more flow control valves could not deliver the required flow even when fully open
6 | System has negative pressures - negative pressures occurred at one or more junctions with positive demand