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

** Warning ** CheckUsedConstructions [closed]

asked 2022-10-06 16:09:53 -0600

IanVG's avatar

updated 2022-10-07 15:19:02 -0600

Full Warning/Error Description:

   ** Warning ** CheckUsedConstructions: There are 23 nominally unused constructions in input.
   **   ~~~   ** For explicit details on each unused construction, use Output:Diagnostics,DisplayExtraWarnings;

This warning doesn't cause any problems, but I would like to resolve it. I ran my model in the OpenStudio Application. Is there a way that I can resolve it? I believe it entails deleting unused construction elements.

Edit: So far using the Remove Orphan Objects and Unused Resources measure did not help. See attached pictures for runtime report.

Remove orphan object run 1 Remove orphan object run 2 Remove orphan object run 3

Edit 2: Well, I am starting to see the problem. I believe I inserted two different libraries (different year versions of 90.1 constructions) and in that process some constructions were duplicated. In order to maintain separate names, the duplicated (or original I am not sure) names appended a "1" to the end. E.g. Typical Interior Floor changes to Typical Interior Floor 1. My current construction set uses a mixture of those constructions (I cannot tell the pattern just yet), but the remove orphan measure will not work on either the appended or original construction if the construction used has the "1" in its name. It's strange behavior. To fix it, I had to replace all constructions with a 1 (I am not currently worried about which year 90.1 construction is really being used) and then run the remove orphan object measure. Below is proof that the measure works for what I am doing. The strange thing about the measure is that even only one unused construction was removed, the measure reports that the model has two fewer objects than it did before.

image description

edit retag flag offensive reopen merge delete

Closed for the following reason the question is answered, right answer was accepted by IanVG
close date 2022-10-07 15:40:39.950874


I tried running the Remove Orphan Objects and Unused Resources, but that did not solve this problem. I will see if there is another measure that do what I am looking for.

Edit: If I were to try and assist in modifying the measure, how would I do so?

IanVG's avatar IanVG  ( 2022-10-07 08:03:19 -0600 )edit

You are correct that this warning doesn't cause any problems and can be ignored. When you run the orphan measure make sure to check the box to remove unused constructions. That is not checked by default By default only orphan objects are removed

David Goldwasser's avatar David Goldwasser  ( 2022-10-07 09:55:18 -0600 )edit

Hmm, well even with that option selected, the unused constructions persisted. I'll add my process to the original question to show the method I went through. I imagine there must be a way in the OS application to fix this. I don't really want to have to do any coding.

IanVG's avatar IanVG  ( 2022-10-07 15:07:48 -0600 )edit

Did you try the 'purge unused objects' icon in as described here:

ericringold's avatar ericringold  ( 2022-10-07 15:41:53 -0600 )edit

Yes I did try that too. It did not work. I assumed the Remove Orphan Objects and Unused Resources is more rigorous than the built-in 'purge unused objects' function in the OS application.

IanVG's avatar IanVG  ( 2022-10-07 15:44:43 -0600 )edit

1 Answer

Sort by ยป oldest newest most voted

answered 2022-10-07 15:40:23 -0600

IanVG's avatar

updated 2022-10-07 15:40:56 -0600

The Remove Orphan Objects and Unused Resources measure will not remove all unused constructions in the model. The CheckUsedConstructions * Warning * is not that important and can be ignored. If you want to remove the constructions that the warning listed, you must go to the constructions tab and manually remove each construction within the construction sub-tab.

edit flag offensive delete link more


Question Tools

1 follower


Asked: 2022-10-06 16:09:53 -0600

Seen: 94 times

Last updated: Oct 07 '22