Fixed hou.ui.readPythonShellHistoryFile() to prevent it from throwing wrong exceptions.

Fixed incorrectly formated data that may be saved to hip files. This bug caused houdini to report a bunch of unknown command errors.

The USD Render ROP now flags an error on the node if it is set to wait for the render process to complete, and the render completes with an error condition (non-zero exit code).

Increased the speed of the Maya plugin when many attributes are present on an output mesh.

Fixed rotation transform issues for box collider input

The pdg Python module now has a pdg.AttributeUtils.ignoreWarnings context block that can be used to temporarily supress @attrib expression warnings caused by the lack of valid work item data.

Fixed hou.Node.asCode(recurse=True) to include sticky notes.

Fixed a bug with the ROP Fetch TOP adding file paths from non-ROP inputs as outputs on work items. This was also causing those files to be deleted when running Deleting All Outputs on the ROP Fetch.

Baking a geometry HDA that uses packed primitives or instancing will now maintain the node instancing for the baked nodes. Previously, the baking process was doing a plain copy of the source nodes, which meant that any instancing relationships would be lost.

Fix regression from 18.5.666 where non-existent texture paths would get lost on FBX scene imports.

Fix issue where HDA wouldn't update when an input actor is deleted.

• Prevent cooking of HDAs cooking during PIE except for HDAs that arerefining geometry.
• Disable HoudiniEngineManager ticking during PIE after refinement hascompleted.

Fixed an issue where input nodes were not cleaned up in the session.

Fixed issues where mesh inputs with LODs would have improper names, so the groups in Houdini wouldn't be set correctly.

Added another ignore error exception. Fatal cook errors are now warnings instead of errors to not disrupt user cooking (because some built-in nodes have errors as well). Fixes issues regarding heightfield flowfield.

Fixed an issue where when using shared vertices, materials would be incorrectly assigned.

• Prevent modifying non-editlayer landscapes when using theModify Layer output mode.
• Fix tracking of transform changes, as well as transform uploading issues,of non-root components in World Input objects.
• Fix transform updating for Spline components.

Ensure that all data from all output nodes are being output.

Version 2:

• Fixed an issue where nodes for world input actors were always recreatedon update
• Fixed an issue where landscape input transform changes were not appliedcorrectly

• Minor null ref fixes and Unity 2021.2 PrefabStageUtility fix.
• Fixed issue where resetting material overrides for upstream cooks would result in an error
• Shorten the "Select from Hierarchy" text depending on inspector width

Adding a warning about removing a user token from sesinetd when the user token has been marked invalid.

Version 2: Fix BSP transform issue.

Fixed issues regarding editable nodes (including curve::1.0) not being processed correctly.

Fixed a bug that caused HAPI_GetServerEnvVarList to give bad results if the environment had changed in between calls to that method.

Fixed a bug where pressing 'Q' to re-do an operation would fail if the state name did not match the default tool name.