F01D

Disk file in use by another application (offline only)

Allen-Bradley · Logix 5000

What does F01D mean?

The disk file is currently being used by another application, preventing an update when operating offline. This indicates a conflict with another software process.

Common Causes

  • Disk file is being used by another application
  • Update not performed (offline only)

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that all other instances of Studio 5000 Logix Designer (or RSLogix 5000) are fully closed before attempting to access the project file.

  2. 2

    Check Windows Task Manager for any background processes that may be holding a lock on the project file, including other Rockwell software components or file indexers.

  3. 3

    Inspect the project file's properties for 'Read-only' attributes or verify that it is not located on a network share experiencing connectivity or synchronization issues.

  4. 4

    Verify the user's read/write permissions for the directory containing the Logix 5000 project file.

  5. 5

    Restart the engineering workstation to clear any potential lingering file locks or application conflicts within the operating system.

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Verified technical data. Last updated: March 2026

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