Weird error in Solars

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When I switch to Solaris, I get a strange error displayed in the Geometry Spreadsheet pane:



Last week, I was getting a lot of crashes while trying to render in Karma, it was the blue screen of death errors, and when I open a blank Houdini session and go to Solaris, it'd display this error.

I have since deleted all Houdini versions and installed fresh.

How can I get rid of this error?

Here's the full error msg:

There is an error in the Scene Graph Details script.

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.751/houdini/python_panels/SceneGraphDetails.pypanel", line 24, in onCreateInterface
toolutils.safe_reload(panel)
File "C:\PROGRA~1/SIDEEF~1/HOUDIN~1.751/houdini/python3.10libs\scenegraphdetails\panel.py", line 451, in __init__
decomposexforms = self.prefs.getPref(
File "C:\PROGRA~1/SIDEEF~1/HOUDIN~1.751/houdini/python3.10libs\husdui\prefs.py", line 335, in getPref
prefs = self._getPrefs()
File "C:\PROGRA~1/SIDEEF~1/HOUDIN~1.751/houdini/python3.10libs\husdui\prefs.py", line 319, in _getPrefs
self._prefs = json.load(f)
File "C:\PROGRA~1\SIDEEF~1\HOUDIN~1.751\python310\lib\json\__init__.py", line 293, in load
return loads(fp.read(),
File "C:\PROGRA~1\SIDEEF~1\HOUDIN~1.751\python310\lib\json\__init__.py", line 346, in loads
return _default_decoder.decode(s)
File "C:\PROGRA~1\SIDEEF~1\HOUDIN~1.751\python310\lib\json\decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "C:\PROGRA~1\SIDEEF~1\HOUDIN~1.751\python310\lib\json\decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Attachments:
solarisError.jpg (242.7 KB)

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Im getting the same issue here.
Could you find a solution?
Edited by VFX_Skull - Jan. 17, 2026 06:44:59
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I fixed it by getting rid of the Houdini folder(on my documents folder) and starting Houdini again so it creates a new one.
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https://www.sidefx.com/forum/topic/102904/ [www.sidefx.com]

I also had a few BSOD errors very recently while rendering with XPU and seems the above post is the reason if
you're still experiencing them.

The Houdini folder in documents on windows is normally the first thing to get corrupted through normal
use or crashes, first course of action I found best is delete/rename that, when Houdini starts up it will make
a fresh one rather than go through the long winded process of uninstall/reinstall.

Obviously this requires configuring Houdini again from default settings so making a copy of that
folder while things are setup and working well then simply swapping it out if/when things go wrong will save a lot time.
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