# CLIENT999: Unexpected error

## What this means[​](#what-this-means "What this meansへの直接リンク")

WCPOS encountered an unexpected error.

Try the action once more, then export diagnostics and contact support if it fails again.

## What to do[​](#what-to-do "What to doへの直接リンク")

Export diagnostics and contact support. WCPOS does not retry this by itself — retry when you are ready.

## Your data[​](#your-data "Your dataへの直接リンク")

The outcome could not be confirmed — verify before retrying. If this persists, export diagnostics and contact WCPOS support.

## Details[​](#details "Detailsへの直接リンク")

* **Code:** `CLIENT999` (`UNEXPECTED_ERROR`)
* **Severity:** error
* **Introduced in:** WCPOS 1.10.0