Missing materials

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Darryl Branton

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Jan 8, 2026, 9:46:54 AM (2 days ago) Jan 8
to THERM
Has anyone else lost materials in the 7.8.80 update?  I updated some time before the Christmas holidays, and when I came back to resume my work, I noticed the library had changed.  Things like XPS insulation became XPS with CO2, but others, such as Concrete - Light Weight and Concrete - Heavy Weight, were no longer available.  I'm also missing Plywood Douglas fir).  I've reinstalled the redistributable libraries, etc as if I were back to a fresh install, and I can't seem to get the old library back via installs.

I am even missing boundary conditions like Interior Normal.

If I open an old file, I get the library conflict notice and can choose to load the library from the file rather than the program. However, this will only provide me with items I used in that file specifically, and I'm unsure what else might be missing.

Any ideas?

Robin Mitchell

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Jan 8, 2026, 4:01:08 PM (2 days ago) Jan 8
to Darryl Branton, THERM
It seems like you have loaded a different library into THERM than the default library. 

You can see all the library options when you go to the Material Library and click the Load Lib, and then select another library from the default (which is material.lib). 

Looking at the Material-Arch.lib, it seems that library has the materials you are referencing. 
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Robin Mitchell
Windows & Envelope Materials Group
Lawrence Berkeley National Laboratory

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