F01A

File owner active

Allen-Bradley · Logix 5000

What does F01A mean?

The file is currently in use by an owner and cannot be accessed or modified. This indicates a resource lock.

Common Causes

  • File owner active - the file is being used

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify if any other programming workstation (e.g., Studio 5000 Logix Designer) is currently online with the Logix 5000 controller.

  2. 2

    Inspect RSLinx Classic or FactoryTalk Linx communication drivers for active or orphaned connections to the controller.

  3. 3

    Check if any HMI, SCADA, or custom application has established an exclusive lock on the controller program or specific tags.

  4. 4

    Attempt to go offline from the current programming session and then reconnect to clear any potentially hung communication sessions.

  5. 5

    Coordinate with other personnel to ensure no other users or applications are attempting simultaneous access to the controller resources.

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Verified technical data. Last updated: March 2026

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