What does Windows error code 4403 (ERROR_APP_DATA_LIMIT_EXCEEDED) mean?

ERROR_APP_DATA_LIMIT_EXCEEDED

Fast Cache data has exceeded its max size and cannot be updated.

ERROR_APP_DATA_LIMIT_EXCEEDED is Win32 error 4403 (0x1133) and belongs to Fast Cache size enforcement.

Where the result appears

• Updating an application cache entry near its maximum size.
• Serializing expanding state into a bounded Fast Cache store.
• A deployment adding fields or assets to cached data.
• Per-user cache growth under repeated updates.

Likely causes

• the new entry or total cache exceeds the configured maximum.
• obsolete versions or duplicate objects were retained.
• compression or pruning expected by the application did not occur.
• a size calculation ignored encoding or serialization overhead.

Troubleshooting steps

• Record current and proposed serialized sizes.
• Record configured per-entry and total limits.
• Record largest retained objects and version history.
• Record encoding, compression, and alignment overhead.
• Record authoritative data that can be omitted or regenerated.

What to verify

Verify whether the new entry or total cache exceeds the configured maximum. Check current and proposed serialized sizes together with configured per-entry and total limits.

Handling, retry, and recovery

Reduce the cached representation, remove obsolete entries through supported APIs, or adjust a documented limit. Never split data arbitrarily if readers expect one atomic versioned object.

Difference from nearby codes

This is a capacity limit, not disk-full evidence; the backing volume can have abundant space while Fast Cache rejects growth.

Practical example

An application starts caching image thumbnails inside a settings object until the bounded entry exceeds its limit.

References

• Microsoft: System Error Codes (4000–5999) — reference for error 4403.
• Microsoft: Storage management — reference for error 4403.
• Microsoft: Troubleshoot data corruption and disk errors — reference for error 4403.