Custom Unit-Unable to Stop Simulation

[nrgeng]

Any reported problems like this?

An outer flowsheet contains an inner flowsheet. The flow sheet solved. The outer flowsheet Stop icon is ignored by the COFE 2.7.0.23 program.

A Controller SP was 0.65005795 then changed to 0.65 and could not manually stop simulation by clicking multiple times on red Stop icon. Used Task Manager in Windows 7 to end program. What is the issue here?

[jasper]

It probably takes significant time to solve the inner flowsheet.

CAPE-OPEN did not yet provide a means to abort a unit operation from calculating, and there was no way for the outer flowsheet to tell teh inner flowsheet to stop calculating. A proposal has recently been made and it will be implemented on embedded flowsheets soon.

But COFE did ask you whether it should abort the simulation, no? It was after you said yes, that it appeared to do nothing?

[nrgeng]

[jasper]

Sorry - I missed your follow-up.

30 minutes seems a bit long. Is it using processor time at all during this period?

If you do not get the "Abort Calculation?" prompt something is wrong. Can you reproduce the problem in a form that I can look at it?

[nrgeng]

Yes, it is using processor time all during this period because the "Not converged" dialog appears repeatedly asking to [Restore] or [Keep] the results. CPU usage in Task Manager spikes to 100% after [Restore] is clicked.

I do not believe that I will be submitting a file for your review. The task is too risky with time expense to try to create a shareable file that would duplicate the reported problem.

Any decision(s) or progress on this problem from your end? Any news on the next COFE release via CUP?

[jasper]

Aiming to release COCO 3. Waiting for 3rd parties.