Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Results summary window is empty - OpenStudio 1.8.0

asked 2015-07-21 15:46:18 -0500

updated 2017-09-25 15:35:22 -0500

I started using OpenStudio a few days ago and am now doing the online video tutorials. I manage to run the very simple simulation in the video with no errors but when I click the "Results Summary" tab, the "Results | OpenStudio" report is empty while the "EnergyPlus report" contains all the information.

Any idea what might be the problem?



edit retag flag offensive close merge delete


What operating system are you using?

ljbrackney's avatar ljbrackney  ( 2015-07-21 21:40:20 -0500 )edit

Did you run the simulation for weather file run periods? You can check this from the Simulation Settings tab, click 'Simulation Control' and check if 'Run Simulation For Weather File Run Periods' is switched on. Running a simulation for sizing periods only will generate an EnergyPlus report, but leave the OpenStudio default report tab blank.

ericringold's avatar ericringold  ( 2015-07-21 21:58:02 -0500 )edit

2 Answers

Sort by ยป oldest newest most voted

answered 2015-07-22 07:58:12 -0500

So it turns out the results viewer was just taking too long to print the results on the screen. The results of a 2-zone model with a simulation duration of one year and a ten minute time step took about 7 minutes to appear!

I left my PC, went to get a cup of coffee and everything was on the screen when I came back. I have an HP laptop with an i5 4300M @ 2.60GHz, 8GB RAM, running Windows 7. Is this common for the computing power of my system?

edit flag offensive delete link more


How many spaces are in each zone?

__AmirRoth__'s avatar __AmirRoth__  ( 2015-07-22 08:46:12 -0500 )edit

That doesn't make a lot of sense. The results are written out to an HTML file that lives down in the model subdirectory. Any delays in rendering when you select that report should have nothing to do with the complexity of the model. Can you take a look in your model directory at run/7-UserScript-0/report.html? You should be able to open that in your browser of choice. If it renders quickly there, then it might be a bug or performance issue related to QT rendering in the app.

ljbrackney's avatar ljbrackney  ( 2015-07-22 09:03:33 -0500 )edit

One space per zone.

I found the HTML file, and I can access it seconds after the simulation is finished. Everything is there. On the contrary the OpenStudio report takes a long time to load. I timed it and it's 4minutes.

dsfakianakis's avatar dsfakianakis  ( 2015-07-22 15:34:14 -0500 )edit

EnergyPlus can be slow if you have many spaces and surfaces in a zone, but it sounds like that's not what's happening here. The mystery deepens.

__AmirRoth__'s avatar __AmirRoth__  ( 2015-07-22 16:02:31 -0500 )edit

It sounds like this is a QT Webkit performance issue, but I'll ask one more question. Were you connected to the internet when you first pulled up the report? It's possible the web frame may have been trying to access resources from the network and timed out.

ljbrackney's avatar ljbrackney  ( 2015-07-22 20:30:27 -0500 )edit

answered 2015-07-23 09:40:13 -0500

Opened issue 1735 on this topic. Thanks for this information!

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops


Question Tools

1 follower


Asked: 2015-07-21 15:46:18 -0500

Seen: 454 times

Last updated: Jul 23 '15