Info: "(21): The device is not ready" error when renaming a file or folder
Problem reported by Cem Alacayir - October 12 at 3:43 AM
Employee Post
On some machines, you may see this error in FileManager when renaming a file or folder:
(21): The device is not ready:
Starting with FileUltimate v6.1.0 and FileVista v7.25.0 (release date was July 16, 2018), there is a new option for fixing this problem (if it actually happens on your system with even recent product versions).
You can now disable AlphaFS with this setting in Web.config:
    <add key="GleamTech:AlphaFileSystemEnabled" value="false" />
Or in code (usually in Application_Start method where you set your license key or other GleamTech related global settings):
GleamTechConfiguration.AlphaFileSystemEnabled = false;
This will fix “The device is not ready” error as it’s caused by AlphaFS and disabling and using regular System.IO would solve the problem. Recent product versions may not need this setting as they may include a newer version of AlphaFS which does not cause this error.

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