Review the Iteration History
The Iteration History window can be opened from the Solution Progress window. You can use this to see which pipes or junctions are farthest out of tolerance, which may direct your troubleshooting efforts toward these elements.
Related Topics
Transfer Results to Initial Guesses
Poor Compressor/Fan Curve Fits
Troubleshooting Resistance Curves
Use the Output Window Sort Feature
Lower the Flow Rate Relaxation
Make Initial Flow Rate Guesses for Pipes
Break a Large Model Into Submodels
Try a Different Fluid, Equation of State or Accuracy Option
Using Lumped Adiabatic as a Starting Point