A Critical Warning message in AFT Impulse alerts users to serious issues in the model results. These messages should always be reviewed by the user, and results containing these messages should never be used for anything other than error resolution.

CRITICAL WARNINGS

• Artificial Transient - Initial pressure conditions at Pipe X Station Y are not steady (Error = Z%)

• FCV/PRV/PSV Could Not Control Flow/Pressure - Pressure Was Added...

• Junction X cavitates. Infinite pipe junctions do not support cavitation

• Junction X Had Reverse Flow - Pump Head Could Not Be Predicted

• Pipe Sequences of zero friction exist, flow rate cannot be calculated

• Setting relaxation lower than relative pressure/flow tolerance gives unreliable results

• The air volume entering through Junction X exceeds the volume of a connected pipe

• The following pipes have vapor volumes in computing stations greater than 100% of the liquid computing volume.

• These results do not represent a converged solution.

• Weir liquid level convergence problem

• Zero-Length Connector experienced cavitation