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Wintab (WinTab32.dll) is an ancient API created by Wacom to communicate tablet-like devices with Windows programs. Before Windows 8, this was the "de facto" standard used to access pressure information from tablets created by Wacom and other brands. Since Windows 8, Microsoft introduced a new official API: the Pointer API/Windows Ink.

Since Aseprite v1.2.34 (and v1.3-beta12), as we've received a lot of crash reports related to buggy third-party WinTab32.dlls, we've switched to the Windows Pointer API by default. (The Wintab option is still available from the Tablet options.)

In previous versions of Aseprite, we tried to load this Wintab library initially, but it could cause the program to crash randomly. Sometimes you can solve this reinstalling drivers, restarting Windows, using the Pointer API from Tablet options, or just disabling Wintab usage from Edit > Preferences > Tablet (or from Edit > Preferences > Experimental in older versions):

Don't load the WinTab driver

Aseprite doesn't start

If you cannot even start the program, you can execute Aseprite with the -disable-wintab parameter (available since Aseprite v1.2):

"C:\Program Files\Aseprite\Aseprite.exe" -disable-wintab

This will avoid loading WinTab32.dll file. Your tablet might not work correctly, but at least Aseprite can be executed and used with your mouse/trackpad (or you can try the Windows Pointer API).


On Steam you can add the -disable-wintab option in the Aseprite launch options:

  1. Right-click Aseprite in your Steam library and open its "Properties":

    Open Aseprite Properties

  2. Click the "Set Launch Options" button:

    Open launch options

  3. Add the -disable-wintab option and press "OK":

    Add disable wintab option


Tablet | Troubleshooting