Problem:
Corruption of data or the ? (Device Class unknown) icon can occur when the USB type within the Virtual Machine configuration for a target OS is either unconfigured within the VM settings, or has been configured for the wrong USB type in comparison with the actual USB device being plugged into your AnywhereUSB Plus hub's USB port.
Solution:
VMWare, VM VirtualBox, and other virtual machine softwares may support the ability to configure the type of USB Controller which the operating system running within the Virtual Machine supports.
The USB Controller options may include the ability to configure explicit USB 1.1 (OHCI), USB 2.0 (EHCI), or USB 3.0 (xHCI) support, which can be useful for maintaining backward compatibility with legacy USB devices, drivers, and/or operating systems which weren't designed for/don't support USB 3.0.
Example:
A 3rd party product that creates 4 virtual comm ports through a single USB port is plugged into one of the USB 1.1 - 3.1 compatible ports of the AnywhereUSB 2 Plus running in a Windows 10 instance on a Virtual Machine. Errors stating "unable to open comm port" begin to appear anytime more than 2 of the virtual comm ports are in use simultaneously - not the expected or desired behavior.
The Virtual Machine's configuration settings (see the support website of the specific Virtual Machine in use for availability and/or configuration information) contain an option to select explicit USB V2.0 or USB v3.0 suppor for the Virtual Machine's USB Controller. The USB Controller is configured as a USB 2.0-only controller, and the issues with the virtual comm port device disappear. The incompatibility issue has been resolved!
If an issue still exists with the AnywhereUSB Manager software installation, please contact Digi Technical Support with the Serial Number of your Digi® product, along with details/screenshots of the issue you're seeing.
Last updated:
Jan 02, 2025