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版本：1.x

DB01001: Connection Failed

What This Means​

The POS could not connect to its local database. WCPOS uses a local database to store products, customers, and other data for fast access and offline functionality.

Common Causes​

  • Storage full — Device has no storage space left
  • Database corrupted — Local database files are damaged
  • Permission issue — App doesn't have storage permissions
  • Browser storage disabled — IndexedDB is disabled (web version)

How to Fix​

1. Check Storage Space​

Ensure your device has available storage:

  • Free up space if storage is full
  • Delete unused apps or files
  • Check available disk space

2. Clear App Data​

Reset the local database:

  • Desktop app: Look for "Clear Data" in settings
  • Web browser: Clear site data for the POS domain
  • Note: This will require re-syncing all data

3. Check Browser Settings (Web)​

If using the web version:

  1. Ensure IndexedDB is enabled
  2. Don't use private/incognito mode (limited storage)
  3. Allow the site to store data

4. Check Permissions​

On desktop:

  • Ensure the app has permission to write to its data directory
  • Check if antivirus is blocking database access

5. Reinstall the App​

If other solutions fail:

  1. Uninstall the POS app
  2. Restart your device
  3. Reinstall the app
  4. Login and sync data

Data Recovery​

If you have unsaved data:

  • The app may have pending changes that couldn't be synced
  • Contact support if you need help recovering data
  • In most cases, data can be re-synced from the server