Deadline 10.3.0.9 - Custom Plugins based of Python version less than 3.10 will break

We released Deadline 10.3.0.9, on August 4, 2023, that includes support for Python 3.10 and no longer includes support for Python 2 and Python 3.7. Any Deadline events plugins,scripts, or application plugins that require anything older than Python 3.10 will not work in Deadline 10.3.x.x. Additional information is available in the Python 3 Upgrade Guide

You will need to upgrade the Repository and Client to the same version (10.3) or the plugin initialization will fail with errors such as below:

2023-08-04 13:06:11:  0: INFO: Executing plugin script 'C:\ProgramData\Thinkbox\Deadline10\workers\<Workername>\plugins\64a48a4a797e59788cc60540\MayaBatch.py'
2023-08-04 13:06:11:  0: INFO: Plugin execution sandbox using Python version 3
2023-08-04 13:06:11:  0: Encountered an error while executing plugin command of type 'Initialize Plugin'
2023-08-04 13:06:11:  0: Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object.
2023-08-04 13:06:14: Exception Details
2023-08-04 13:06:14: RenderPluginException -- The Deadline Plugin was not properly initialized. Application plugins must explicitly call `super().__init__()` in the Python constructor: `def __init__()`.
2023-08-04 13:06:14: RenderPluginException -- The Deadline Plugin was not properly initialized. Application plugins must explicitly call `super().__init__()` in the Python constructor: `def __init__()`.
2023-08-04 13:06:14: RenderPluginException.Cause: JobError (2)
2023-08-04 13:06:14: RenderPluginException.Level: Major (1)
2023-08-04 13:06:14: RenderPluginException.HasSlaveLog: True

To upgrade your custom plugins, scripts, or events you need to make some changes. A screenshot of the diff of two versions of a Cinema 4D Batch plugin shows the changes you will need to make to your script is below:

(Left is Python 3.10 updated plugin for Cinema 4D Batch).

For this plugin the changes below were required:

1. Importing the sys module: You will need to import sys module if it is not imported already

import sys

2. Changes inside the Plugin Class>> Constructor Method :

class Cinema4DBatchPlugin( DeadlinePlugin ):
    MyCinema4DController = None
    def __init__(self):
        if sys.version_info.major == 3:
            super().__init__()

3. Changes inside the Plugin Managed Process>> Constructor Method:

class Cinema4DProcess( ManagedProcess ):
    Cinema4DController = None
    def __init__( self, cinema4DController ):
        super().__init__()