Fixed a crash related to outputs of collapsed VOP nodes.

Fixed an issue in APEX Script where untyped nulls with an output wired and the corresponding spare input unwired would fail to decompile.

The menu to select AOVs for the variance oracle no longer replaces the previous AOV, but instead toggles AOVs.

Packages - new preload_libraries keyword

• Adding the ability for package.json files to include a `preload_libraries` key, whichis a list of dynamic libraries which should be loaded (dlopen/LoadLibrary) by Houdinibefore trying to install any other binary plugins.

Fixed errors thrown by sliders in Context Options.

Fixed Color Editor sliders text fields that could display black when dragging the sliders.

Fixed a bug where the built-in "Material Name" Cryptomatte layer may produce non-deterministic names when using instancers.

Rig State: Fix a bug where the limb controls did not get properly parented to the root. Make sure that the root allows the joint mapping to be updated.

Fixed a potential crash display apex scenes on some devices

Fix a bug in the Rig State where the number of joints set for splines or fk chains was not matchint up with the set number and dissallow joint chains with less than 2 joints.

Fix Python exception in hotkey editor.

Fixed a crash when displaying apex characters using constraints Fixed a bug where attribute data would be re-uploaded to GPU even though the contents hadn't changed

Fixed a bug in the Apex Animate State where the effect of a constraint would disappear when moving the mouse into the viewport until another action was taken.

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Fix a bug in the Autorig Builder SOP the foot ball guide control would dissappear if a foot component was created without a pre existing skeleton

Fixed potential crash introduced in 21.0.464 when applying animation catalog captures.

Fixed a bug in APEX Animate where the constraints in a scene would reappear after closing and opening the state when all constraints were removed.

Fixed a bug where the APEX Scene Invoke SOP would not properly setup the scene's constraints.

Fixes a bug where the Cryptomatte Picker State would throw python exceptions while trying to pick in the composite view.

Fixed a bug where some multiparm interface operations did not trigger the multiparm's callback.

Fixed a bug where selecting multiple multiparm instances and drag-dropping them would not behave correctly.

Fixed a bug in the Scatter 2.0 SOP that could result in a crash when an allocation fails.

Tweaked the clamping when auto-resizing handles lower to allow handles to maintain their size at higher zoom levels.

Simplified RBD Destruction LOP's handling of v,w and accel attribs and fixed a bug with the native instances velocities getting double transforms.

• Fix OCIO editor incorrectly raising an exception when adding rules withOCIO config version 1 files.
• Disable add/remove rule buttons for OCIO config version 1 and display awarning about the requirements for editing rules.