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Error message (don't change this)
Anki 26.09.2 (bb0dd6d1) (ao)
Python 3.13.15 Qt 6.11.2 PyQt 6.11.0
Platform: Windows-11-10.0.26200-SP0

Traceback (most recent call last):

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\main\utils.py", line 757, in _create_backup_with_retry_anki_50
    created = _create_backup_anki_50()

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\main\utils.py", line 775, in _create_backup_anki_50
    created = aqt.mw.col.create_backup(
        backup_folder=aqt.mw.pm.backupFolder(),
        force=True,
        wait_for_completion=True,
    )

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\anki\collection.py", line 349, in create_backup

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\anki\_backend_generated.py", line 172, in create_backup

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\anki\_backend.py", line 175, in _run_command

anki.errors.BackendIOError: Failed to read 'C:\Users\ellie\AppData\Roaming\Anki2\User 1\collection.anki2': out of memory


During handling of the above exception, another exception occurred:


Traceback (most recent call last):

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\aqt\taskman.py", line 152, in raise_exception

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\aqt\taskman.py", line 148, in _on_closures_pending

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\aqt\taskman.py", line 88, in <lambda>

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\aqt\taskman.py", line 111, in wrapped_done

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\aqt\operations\__init__.py", line 253, in wrapped_done

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\ankihub_sync.py", line 214, in on_failure
    on_done(future_with_exception(exception))
    ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\gui\auto_sync.py", line 100, in sync_with_ankiweb
    future.result()
    ~~~~~~~~~~~~~^^

  File "concurrent\futures\_base.py", line 453, in result

  File "concurrent\futures\_base.py", line 402, in __get_result

  File "concurrent\futures\thread.py", line 59, in run

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\aqt\operations\__init__.py", line 243, in wrapped_op

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\gui\operations\ankihub_sync.py", line 203, in <lambda>
    op=lambda _: ah_deck_updater.update_decks_and_media(
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
        ah_dids,
        ^^^^^^^^
        raise_if_full_sync_required=raise_if_full_sync_required,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        start_media_sync=start_media_sync,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ),
    ^

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\gui\deck_updater.py", line 67, in update_decks_and_media
    self._update_decks(ah_dids)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\gui\deck_updater.py", line 86, in _update_decks
    create_backup()
    ~~~~~~~~~~~~~^^

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\main\utils.py", line 742, in create_backup
    raise exc

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\main\utils.py", line 732, in create_backup
    created = _create_backup_with_retry_anki_50()

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\main\utils.py", line 767, in _create_backup_with_retry_anki_50
    raise exc

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\main\utils.py", line 764, in _create_backup_with_retry_anki_50
    created = _create_backup_anki_50()

  File "C:\Users\ellie\AppData\Roaming\Anki2\addons21\1322529746\main\utils.py", line 775, in _create_backup_anki_50
    created = aqt.mw.col.create_backup(
        backup_folder=aqt.mw.pm.backupFolder(),
        force=True,
        wait_for_completion=True,
    )

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\anki\collection.py", line 349, in create_backup

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\anki\_backend_generated.py", line 172, in create_backup

  File "D:\a\anki\anki\out\installer\build\anki\windows\visualstudio\x64\Release\app_packages\anki\_backend.py", line 175, in _run_command

anki.errors.BackendIOError: Failed to read 'C:\Users\ellie\AppData\Roaming\Anki2\User 1\collection.anki2': out of memory

Sentry link (for developers)

Hello,

Please try the following.

  1. On your Anki, go to Tools → Check Database
  2. Restart Windows and retry with memory-heavy applications closed