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[About Cubism Editor / SDK 5.4 Alpha](Updated: July 14, 2026)

You can download the alpha installer from the dedicated forum below.
If you have any feedback regarding the alpha version, including feature requests or bug reports, please use the same forum.

Cubism Editor / SDK 5.4 Alpha Forum
https://creatorsforum.live2d.com/c/cubismeditorsdk54alpha/

[Regarding macOS Tahoe](Updated October 16, 2025)

macOS v26 Tahoe is now supported!
We advise against upgrading your macOS at this time as it may cause Live2D products not to function correctly.
Upgrading macOS can also cause you to lose your Cubism Editor license file.
Please make sure to deactivate your Cubism Editor license before upgrading the macOS.

For more details:
https://help.live2d.com/en/other/other_09/
For inquiries regarding issues with license purchases or license activation errors, please contact us through the email form.

java.lang.OutOfMemoryError: Java heap space [ISSUE]

ZephirineZephirine
edited January 2024 in Help
I'm trying to save my model and am getting this error message "java.lang.OutOfMemoryError: Java heap space". It seems like I need to increase my java memory, but can't seem to find out how, and the manual page that used to show it seems to have been deleted. If anyone knows how to solve this problem, I'd greatly appreciate any help!
(Also, I tried searching my Environment Variable for "_JAVA_OPTIONS", but there is no such variable present).

- Live2D Software Version: Cubism Editor 5.0.03
- OS & Version: Windows 11
- PC Model: Micro-Star MS-7D09
- Graphics Specifications: GeForce RTX 3070
- CPU: Intel(R) Core(TM) i7-11700K
- Memory: 32GB
- Illustration Software used: ClipStudio
- Attach a screenshot or capture video to show your problem:
-
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Comments

  • obsidianobsidian
    edited January 2024
    Hello, there. Maybe you can gain memory to edit "CubismEditor5.bat" file.
    The file is in Program Files->Live2D Cubism 5.0 directory. Don't open by double click. You need to open it by Text Editor.

    ```
    rem ** Memory Size
    rem set MAX_MEMORY=4000 // <- You can edit this number, 8000, 16000, and so on.
    rem set MAXMEMORY=-Xmx%MAX_MEMORY%m
    set MAXMEMORY=-XX:MaxRAMPercentage=100
    ```

    I hope this leads to a resolution.
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  • fukui(staff)fukui(staff)
    @Zephirine
    Thank you for your continued patronage of our products.
    We are Live2D staff.

    Regarding the change in memory usage in the Cubism Editor, the current version has been changed to a usage that does not require any operation.

    Although no operation is normally required, you can find instructions on how to deal with this in the link below, which we hope you will read if you are interested.
    ▼About Memory Usage
    https://docs.live2d.com/4.2/en/cubism-editor-manual/memory-usage/

    Also, to lighten the operation, if you have been re-importing PSDs, try deleting unused originals.
    ▼Delete unused layers
    https://docs.live2d.com/en/cubism-editor-manual/original-picture/#:~:text=Delete unused layers

    If other software is running, close it down.

    Best regards.

    @obsidian
    Thanks for the great advice!
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