A Warning message in AFT Impulse.

Centrifugal pump curves typically have a point at which they no longer operate on the curve. This may be called end of curve or runout. Data defining runout for a particular pump is given by the manufacturer. Such data has been defined for this pump in the Pump Configuration window, and the system is operating past the runout flow rate. Thus the results are likely invalid, as the real pump may not be able to operate at that point.