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Changing Infiltration rate values in Openstudio gives fatal errors

asked 2014-11-24 14:19:16 -0500

Xandrika's avatar

updated 2014-11-24 15:02:54 -0500

I am trying to create my own space types and would like to change Space Infiltration Design Flow Rate. However, after doing so, the model gives fatal errors while simulation run:

*************** IDF Context for following error/warning message:
************* Note -- lines truncated at 300 characters, if necessary...
*************   4759 ZoneInfiltration:DesignFlowRate,
************* indicated Name=New_Infiltration_Rate
************* Only last 3 lines before error line shown.....
*************   4760   New_Infiltration_Rate,                  !- Name
*************   4761   Guestroom_Double Cottage,               !- Zone or ZoneList Name
*************   4762   ,                                       !- Schedule Name
** Severe  ** IP: IDF line~4762 Error detected in Object=ZONEINFILTRATION:DESIGNFLOWRATE, name=NEW_INFILTRATION_RATE
**   ~~~   ** Field [Schedule Name] is required but was blank**

What am I doing wrong?

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Try to look through those errors first to trouble shoot what happened. Often, as it does here, it gives a good description of the issue.

 Error detected in Object=ZONEINFILTRATION:DESIGNFLOWRATE, name=NEW_INFILTRATION_RATE * ~~~ * Field [Schedule Name] is required but was blank*
David Goldwasser's avatar David Goldwasser  ( 2014-11-24 14:32:40 -0500 )edit

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answered 2014-11-24 14:30:09 -0500

updated 2016-05-27 14:37:00 -0500

Looks like you need to associate a schedule with the infiltration object. Typically this is done by associating a schedule set (that has an infiltration schedule) with the space or space type that has the infiltration object, but you can also select the infiltration object and pick a schedule from the PickList in the edit pane at the right. It isn't in a drop zone like other internal loads are. Also unlike Design Specification Outdoor Air where the schedule is optional, it is required for infiltration. Here is a link to documentation on space type loads.

Update: Based on the issue I filed (see comment below) I created a measure that will remove this orphan object for you. In fact the measure is more generic and will remove any orphan internal loads as well as orphan surfaces and sub-surfaces as well. Additionally it has check boxes if you want to remove many types of unused resources such as space types, loads, schedules, and constructions/materials. You can run this with apply measures now to fix your model.

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Thanks. Yes, I tried trouble shooting but without progressing. I also added schedules. schedule is: ...still giving errors: It seams that the model is corrupted:-( What I noticed that even I delete or replace the ZONEINFILTRATION:DESIGNFLOWRATE the old one is still in the code and gives errors. I tried several time following the standard templates to modify the ZoneInfiltration:DesignFlowRate and always got the same fatal errors. What can I do?

Xandrika's avatar Xandrika  ( 2014-11-25 01:41:48 -0500 )edit

@Xandrika, thanks you did indeed find a bug. I just filed it, and it should be fixed before too long. In the mean time here are the options. What is happening is that the infiltration object that should be deleted is just being disconnected and orphaned in the model.

  1. Send the file to and I'll fix it
  2. Open your OSM with a text editor and find the offending object, and delete it
  3. I'll make a measure and post it that removes these orphan objects. I'll provide link here when it is done.
David Goldwasser's avatar David Goldwasser  ( 2014-11-25 09:51:17 -0500 )edit

Great, Thanks. I think I will manage to delete the orphanes in the OSM:-)

Xandrika's avatar Xandrika  ( 2014-11-26 02:20:16 -0500 )edit

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Asked: 2014-11-24 14:19:16 -0500

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Last updated: May 27 '16