Q100024: Missing FurnaceCore nodes and/or "Constructor failed" error message

Jake

Updated : November 21, 2019 16:49

Created : January 21, 2016 15:12

SYMPTOMS

FurnaceCore nodes and/or Keylight are missing from the nodes toolbar in Nuke.

When you load an existing .nk script that contains a Keylight, FurnaceCore or other OFX plugins Nuke will produce an error message like the following:

"Constructor for OFXuk.co.thefoundry.keylight_v201 failed"

CAUSE

Nuke records the location of available OFX plugins (including nodes that ship with Nuke such as Keylight) in the ofxplugincache directory within Nuke's cache location.

This error message happens when the OFX cache file for that version of Nuke becomes corrupted.

RESOLUTION

Deleting the OFX plug-in cache directory will force Nuke to rebuild it the next time it starts up.  Nuke will then be able to find and load the OFX nodes/plug-ins.

The default locations for the OFX Plugin Cache is

• Linux and OSX:
  /var/tmp/nuke-{uid}/ofxplugincache/
  
  where {uid} is the users user ID on the machine, e.g.
  /var/tmp/nuke-u1737/ofxplugincache
  
  
• Windows:
  C:\Users\{user name}\AppData\Local\Temp\nuke\ofxplugincache
  
  where {user name} is your account user name on the machine, e.g.
  C:\Users\Jake\AppData\Local\Temp\nuke\ofxplugincache
  
  

You can also find the location of Nuke's general cache directory from within Nuke by hitting x on your keyboard when the focus is on the nodegraph and then running the following TCL command

getenv NUKE_TEMP_DIR

There should be an ofxplugincache directory beneath the location printed

Keywords: constructor failed, keylight, furnace core