I have previously used Houdini engine in maya with no problems a while back, so am not sure what the problem currently is. I have also uninstalled and reinstalled the plugin just in case. When I load my HDA with the Maya Houdini engine plugin I get this error from the maya script editor.

// Error: Could not instantiate asset: Benjamin::Sop/test::1.0
// in OTL file: C:/Users/Benjamin/Downloads/sop_Benjamin.test.1.0.hda
// Error: HAPI Error: Error running C:/Users/Benjamin/htoa/htoa-6.3.6.0_rdb9241e_houdini-20.5.445.py310/htoa-6.3.6.0_rdb9241e_houdini-20.5.445.py310/scripts/obj/geo.py:
// Traceback (most recent call last):
// File "C:/Users/Benjamin/htoa/htoa-6.3.6.0_rdb9241e_houdini-20.5.445.py310/htoa-6.3.6.0_rdb9241e_houdini-20.5.445.py310/scripts/obj/geo.py", line 1, in <module>
// import htoa.properties
// File "C:\Users/Benjamin/htoa/htoa-6.3.6.0_rdb9241e_houdini-20.5.445.py310/htoa-6.3.6.0_rdb9241e_houdini-20.5.445.py310/scripts/python\htoa\properties.py", line 9, in <module>
// from pxr import Usd, UsdLux
// File "C:\Program Files\Autodesk\MayaUSD\Maya2025\0.30.0\mayausd\USD\lib\python\pxr\Usd\__init__.py", line 24, in <module>
// from pxr import Tf
// File "C:\Program Files\Autodesk\MayaUSD\Maya2025\0.30.0\mayausd\USD\lib\python\pxr\Tf\__init__.py", line 164, in <module>
// PreparePythonModule()
// File "C:\Program Files\Autodesk\MayaUSD\Maya2025\0.30.0\mayausd\USD\lib\python\pxr\Tf\__init__.py", line 89, in PreparePythonModule
// module = importlib.import_module(
// File "C:\PROGRA~1\SIDEEF~1\HOUDIN~1.445\python310\lib\importlib\__init__.py", line 126, in import_module
// return _bootstrap._gcd_import(name, package, level)
// ImportError: DLL load failed while importing _tf: The specified module could not be found.
// Error: Benjamin__test__1_01: The node contains an invalid asset. Check the OTL file path and asset name.



If anyone can help that would be greatly appreciated.
Thanks Ben

Please try disabling mtoa in the plugin manager and see if that fixes it.