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版本：1.x

DB01003: Transaction Failed

What This Means​

A database transaction could not be completed. Transactions group multiple operations together — if any part fails, everything is rolled back to maintain data integrity.

Common Causes​

  • Concurrent access — Multiple operations trying to modify the same data
  • Storage full — No space to write new data
  • Database locked — Another process is locking the database
  • Power interruption — Operation interrupted unexpectedly

How to Fix​

1. Retry the Operation​

The issue may be temporary:

  • Wait a moment
  • Try the operation again
  • Avoid rapid repeated attempts

2. Check for Conflicts​

If multiple devices or tabs are open:

  • Use one instance at a time
  • Close duplicate browser tabs
  • Coordinate multi-device usage

3. Check Storage Space​

Ensure there's space for data:

  • Check available disk space
  • Free up space if needed
  • Clear browser cache (web version)

4. Restart the Application​

Reset the database state:

  1. Close the POS completely
  2. Wait a few seconds
  3. Reopen the application

5. Clear and Re-sync​

If transactions consistently fail:

  1. Clear local data
  2. Login again
  3. Sync fresh from server

Transaction Safety​

WCPOS uses transactions to ensure:

  • Data consistency
  • Complete operations (all or nothing)
  • Protection against partial updates

When a transaction fails, your data remains consistent.