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Rendering with Arnold in Houdini and Solaris using the HtoA plug-in.
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HtoA - ERROR - node "driver_houdini" is not installed

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Anonymous
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HtoA - ERROR - node "driver_houdini" is not installed

Houdini 18.0.566.

WIndows 10


All SOP level objects are available and work fine. When clicking "Render to Disk", nothing is sent to Mplay, and this error pops up.


00:00:00   336MB         | log started Tue Sep 22 16:44:58 2020
00:00:00   336MB         | Arnold 6.0.4.0 [3fad32b9] windows icc-17.0.2 oiio-2.2.1 osl-1.11.6 vdb-4.0.0 clm-1.1.1.118 rlm-12.4.2 optix-6.6.0 2020/07/31 08:11:38
00:00:00   336MB         | running on DESKTOP-HF9PIT5, pid=15564
00:00:00   336MB         |  1 x AMD Ryzen 7 2700X Eight-Core Processor  (8 cores, 16 logical) with 65467MB
00:00:00   336MB         |  NVIDIA driver version 451.67 (Optix 60600)
00:00:00   336MB         |  GPU 0: GeForce GTX 980 Ti @ 1190MHz (compute 5.2) with 6144MB (4997MB available) (NVLink:0)
00:00:00   336MB         |  
00:00:00   336MB         |  soft limit for open files raised from 512 to 2048
00:00:00   336MB         |  
00:00:00   336MB         | [htoa_op] Begin registration ...
00:00:00   336MB         | loading plugins from C:/Users/jonco/htoa/htoa-5.4.0_r1db094a_houdini-18.0.566/htoa-5.4.0_r1db094a_houdini-18.0.566/arnold/plugins ...
00:00:00   336MB         |  alembic_proc.dll: alembic uses Arnold 6.0.4.0
00:00:00   336MB         |  cryptomatte.dll: cryptomatte uses Arnold 6.0.4.0
00:00:00   337MB         |  cryptomatte.dll: cryptomatte_filter uses Arnold 6.0.4.0
00:00:00   337MB         |  cryptomatte.dll: cryptomatte_manifest_driver uses Arnold 6.0.4.0
00:00:00   337MB         |  htoa_mandelbulb_proc.dll: mandelbulb uses Arnold 6.0.4.0
00:00:00   348MB         |  usd_proc.dll: usd uses Arnold 6.0.4.0
00:00:00   348MB         | loaded 6 plugins from 4 lib(s) in 0:00.07
00:00:00   348MB         | [htoa_op] Loading metadata file: C:/Users/jonco/htoa/htoa-5.4.0_r1db094a_houdini-18.0.566/htoa-5.4.0_r1db094a_houdini-18.0.566/arnold/metadata/cameras.mtd
00:00:00   349MB         | [htoa_op] Loading metadata file: C:/Users/jonco/htoa/htoa-5.4.0_r1db094a_houdini-18.0.566/htoa-5.4.0_r1db094a_houdini-18.0.566/arnold/metadata/lights.mtd
00:00:00   349MB         | [htoa_op] Loading metadata file: C:/Users/jonco/htoa/htoa-5.4.0_r1db094a_houdini-18.0.566/htoa-5.4.0_r1db094a_houdini-18.0.566/arnold/metadata/operators.mtd
00:00:00   349MB         | [htoa_op] Loading metadata file: C:/Users/jonco/htoa/htoa-5.4.0_r1db094a_houdini-18.0.566/htoa-5.4.0_r1db094a_houdini-18.0.566/arnold/metadata/options.mtd
00:00:00   349MB         | [htoa_op] Loading metadata file: C:/Users/jonco/htoa/htoa-5.4.0_r1db094a_houdini-18.0.566/htoa-5.4.0_r1db094a_houdini-18.0.566/arnold/metadata/shaders.mtd
00:00:00   351MB         | [htoa_op] Loading metadata file: C:/Users/jonco/htoa/htoa-5.4.0_r1db094a_houdini-18.0.566/htoa-5.4.0_r1db094a_houdini-18.0.566/arnold/metadata/shapes.mtd
00:00:00   351MB         | [rop_operators] Registering operators ...
00:00:00   351MB         | [rop_operators] operator registration done.
00:00:00   356MB         | [vop_shaders] Registering shaders ...
00:00:00   358MB         | [vop_shaders] shader registration done.
00:00:00   358MB         | [htoa_op] End registration.
00:00:00   358MB         |  
00:00:00   358MB         | releasing resources
00:00:00   356MB         | Arnold shutdown
00:00:00    71MB         | Arnold 6.0.4.0 [3fad32b9] windows icc-17.0.2 oiio-2.2.1 osl-1.11.6 vdb-4.0.0 clm-1.1.1.118 rlm-12.4.2 optix-6.6.0 2020/07/31 08:11:38
00:00:00    78MB         | authorizing with license manager: user ...
00:00:00   352MB         | log started Tue Sep 22 16:45:03 2020
00:00:00   352MB         | Arnold 6.0.4.0 [3fad32b9] windows icc-17.0.2 oiio-2.2.1 osl-1.11.6 vdb-4.0.0 clm-1.1.1.118 rlm-12.4.2 optix-6.6.0 2020/07/31 08:11:38
00:00:00   352MB         | running on DESKTOP-HF9PIT5, pid=15564
00:00:00   352MB         |  1 x AMD Ryzen 7 2700X Eight-Core Processor  (8 cores, 16 logical) with 65467MB
00:00:00   356MB         |  NVIDIA driver version 451.67 (Optix 60600)
00:00:00   356MB         |  GPU 0: GeForce GTX 980 Ti @ 1190MHz (compute 5.2) with 6144MB (4995MB available) (NVLink:0)
00:00:00   356MB         |  
00:00:00   356MB         |  soft limit for open files is set at 2048
00:00:00   356MB         |  
00:00:14   698MB ERROR   | node "driver_houdini" is not installed
00:00:19   700MB ERROR   | node "driver_houdini" is not installed
00:00:22   702MB ERROR   | node "driver_houdini" is not installed



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Message 2 of 2
Stephen.Blair
in reply to: Anonymous

Does this happen all the time? Has it ever worked on this machine?


Can you get a Process Monitor log? That will show what's happening when Houdini / HtoA tries to load driver_houdini. Most likely it's a DLL version problem. For example, it could be an incompatible version of zlib1.dll


  • Download Process Monitor and extract it to a folder https://technet.microsoft.com/en-us/sysinternals/processmonitor.aspx
  • Start Process Monitor and start capturing events (CTRL+E or the magnifying glass icon)
  • Start Houdini
  • Render something to get the error
  • Go back to Process Monitor and stop capturing events
  • Save the Process Monitor log to a .PML file
  • Zip up the log and post it somewhere (such as dropbox, google drive, wetransfer)


// Stephen Blair
// Arnold Renderer Support

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