A Warning message in AFT Arrow alerts users to issues in the model that will affect the model results. These warnings often offer important information about the converged solution or the model itself, and should always be reviewed before considering the results to be meaningful for the system.

WARNINGS

• Chempak temperature and/or pressure is out of range for the following

• Concentration at Junction X may not be balanced (total= Y)

• Control valve open percentage outside valid range of 0-100% at Junction X

• Energy may not be balanced at Junction X

• FCV could not control flow at Junction X

• Flow may not be balanced at Junction X

• Fluid is no longer in the vapor phase because the fluid temperature/pressure is...

• GSC Goal may not be valid. User goal = X. Final goal result = Y

• Inlet and outlet pipes at Junction X do not have the same stagnation enthalpy.

• Junction X Compressor/Fan Added Negative Pressure

• Junction X Exceeded Runout Flow Rate...

• Maximum system pressure exceeded enthalpy table's maximum pressure of X. Enthalpy is extrapolated for pressures exceeding this value.

• Physical flow area is less than the sonic area at junction X...

• Pipe X temperature is equal to or greater/less than the maximum/minimum temperature limit of...

• Pipe/Junction X property calculation exceeded maximum local iteration limit. Error value = Y, Tolerance = Z, (Code #XYZ)

• Pipe/Junction X property calculation failed to continue towards convergence. Error value = Y, Tolerance = Z, (Code #XYZ)

• PRV could not control pressure at Junction X

• PSV could not control pressure at Junction X

• Separator junction X is trying to remove Y but none is entering junction

• Separator junction X is trying to remove Y of Z but only A is entering junction

• Temperature at inlet/exit of pipe X is above/below max/min fluid temperature range

• Unique solution not possible - Relief valve cycles