Fortnox error: 2000401

Fortnox error: 2000401 – The period is locked up to xxx. Unlock the period to proceed.

What the error means

The error message Fortnox error: 2000401 – The period is locked up to xxx. Unlock the period to proceed. occurs when the integration platform attempts to export information to Fortnox for an accounting period that has been locked. When a period is locked, it's not possible to post or export data to that period, causing the export to fail.

How to resolve the error

1. Unlock the accounting period in Fortnox

Cause:

The accounting period has been manually locked by the user, which blocks further posting or export of information to the period.

Solution:

• Log in to Fortnox with an account that has permission to manage period locks.

• Navigate to Settings → Accounting → Period Locking.

• Identify the current period that is locked (in this case, up to 2024-09-30).

• Remove or adjust the period lock so that the period is open for posting.

• Then, attempt the export again.

2. Export to a later period (alternative solution)

Cause:

It's possible that the export is mistakenly set to occur in an already locked period.

Solution:

• Check the settings in the integration platform and ensure that the export is set to a current, unlocked period.

• Change the period date to a date after 2024-09-30.

• Perform the export again to ensure that the error does not occur.

Summary

To resolve the issue, the accounting period must either be unlocked in Fortnox, or the export must be directed to a period that is not locked. After making these adjustments, always verify that the export is completed correctly and that the information is properly registered in Fortnox.