i'm having many problems with a dynamic simulation in hysys!!!
frequently appear the following warning messages:
1. a numerical error of some sort has occured
2. very low efficiency flash failed. Increased efficiencies to 5% which allowed flash to succeed!

which mean???????

Can you advice on the range values to have be include in the tab integrators (general and execution)??

p.s. sorry for my english
thank you in advance