Import Error: THERM files into WINDOW

Skip to first unread message

J. Ray

Mar 5, 2024, 10:19:31 PMMar 5
Hello, I am encountering an unexpected error when I try to import some THERM files into the "Frame Library" in WINDOW.   Files were simulated using THERM, and I am attempting to import them into WINDOW

The usual import dialog displays 3 subsequent error messages after trying to import: 1) "Invalid Material Properties", 2) "Unexpected File Format", and 3) "Trouble loading file: <filepath>"  (see attached pictures)

I'm encountering this error on 8 out of 9 files I have tried to import today; I tried restarting my computer, but that didn't fix the problem.  Can anyone offer advice on how to resolve this?  I'm trying to finish a time-sensitive energy simulation for my client this week.


Robin Mitchell

Mar 5, 2024, 10:21:19 PMMar 5
to J. Ray, THERM
I think the issue is that you are importing a THERM file created with a version that is more recent than the WINDOW version you are importing into. 

You need to use the same versions for both THERM and WINDOW when using them together. 

I would recommend using the latest version of 7.8 for both, which is 7.8.74


You can view the THERM forum online at:
You received this message because you are subscribed to the Google Groups "THERM" group.
To unsubscribe from this group and stop receiving emails from it, send an email to
To view this discussion on the web visit

Robin Mitchell
Building Technology and Urban Systems Division
Energy Technologies Area
Lawrence Berkeley National Laboratory

Joshua Ray

Mar 6, 2024, 12:29:59 PMMar 6
to Robin Mitchell, THERM
I updated to WINDOW 7.8.74 and that seems to have fixed the problem. Thanks for your help!

On Mar 5, 2024, at 7:21 PM, Robin Mitchell <> wrote:

Reply all
Reply to author
0 new messages