Send to Unreal - init() got an unexcepted keyword argument 'headers', file unreal.py, line 912

[Lud04]

• Addon: Send to Unreal (tested from ver. 2.0.0 to 2.2.1)

• Steps to Reproduce the Problem: export anything, either a simple cube or a custom mesh with skeleton and animations...

• Error Log (Blender Console): __init__() got an unexpected keyword argument 'headers' File "C:\Users\MyUser\AppData\Roaming\Blender Foundation\Blender\3.3\scripts\addons\send2ue\dependencies\unreal.py", line 912

• OS: Windows 10

• Addon Version: Send to Unreal from 2.0.0 to 2.2.1

• Blender Version: Blender 3.3.3 LTS (also tested in 3.4.1)

• Unreal Version: Unreal 4.26.2

  Everytime I try to use the Send to UE in the version 4.26.2 it gives me the error mentioned above in the Blender console. Tested in the versions from 2.0.0 to 2.2.1 using Blender 3.3.3 LTS and also in 3.4.1.

  However when I try to export to the latest UE 5.1 no errors appear, everything exports and imports fine to Unreal, but I need to use 4.26.2 to work in a project... Also tested importing the .uasset files from 5.1 to 4.26.2, but they are not recognized, so it's not an option :(

Code block related to the error (unreal.py, line912) v

@staticmethod
    def directory_exists(asset_path):
        """
        Checks to see if a directory exist in unreal.

        :param str asset_path: The path to the unreal asset.
        :return bool: Whether or not the asset exists.
        """
        # TODO fix this when the unreal API is fixed where it queries the registry correctly
        #  https://jira.it.epicgames.com/browse/UE-142234
        # return unreal.EditorAssetLibrary.does_directory_exist(asset_path)
        return True

[james-baber]

Hey @Lud04 we have a limited number of various unreal blender versions we do testing with. So in the release notes if it says tested against version x.x then that is all the we can guarantee. There was some unreal python API changes when we went from 4 to 5.

This I believe is the last release we tested against 4. https://github.com/EpicGames/BlenderTools/releases/tag/20220405224835

In the future we'd like to increase our testing and support for older versions, but don't have to cycles to do so right now. So I think your best bet right now is to upgrade your project to 5 or grab and older release of send2ue

[Lud04]

Oh ok, thanks for the help! I'll stick to older versions of the plugin then.