It seems that I could wait 30 minutes, two hours, whatever and the simulation would not stop. Shall I test it by waiting 30 minutes and then consider that it will never stop?
COFE did not ask whether it should abort the simulation. It did nothing after I clicked the red Stop icon. Usually the icon's background changes to indicate it received the click, but in this case no feedback of receiving the click was given.
Here is what normally happens.
COFE responses after clicking red Stop icon:
{Stop:} Abort calculation? [Yes] {No]
{Not converged:} User abort. Keep current iteration results for current recycle(s) or restore to previous stream specifications? [Keep] [Restore]
{Solve failed:} user abort [Ok] Note: Dialog window is too small so entire message is not shown.
Legend with format of "{ } Message [ ] [ ]"
{ } dialog title
[ ] clickable selection(s)
The good news is that you are aware of the problem and you will implement a fix soon. When do you expect to provide the next COFE release through CUP?