UBTECH Alpha Servos UBT-12HC icon UBTECH Alpha Servos UBT-12HC — Control UBTECH Alpha UBT-12HC smart servos via ARC using EZ-B v4/IoTiny UART, assign virtual ports, set baud, custom bits and position mapping. Try it →
 

Startup Errors

When ARC is loading, a loading screen appears and the bottom-left corner displays the current initialization step. If loading seems to pause for a while, ARC may still be initializing or synchronizing a large amount of data. During this time, any robot skill updates in the Skill Store will also sync if an internet connection is available.

ARC loading screen with initialization status shown in the bottom-left corner
ARC loading screen with initialization progress information.

Cef Chromium Embedded Browser

ARC uses a Chromium Embedded Browser (WebView) for rich media content, including Blockly. If you see an error similar to the example below, a required redistributable library may be missing from your system.

=== Exception Information ===
Type: System.InvalidOperationException
Message: Cef.IsInitialized was false!. Check the log file for errors. See https://github.com/cefsharp/CefSharp/wiki/Trouble-Shooting#log-file for details.
HResult: -2146233079
Source: CefSharp.WinForms
TargetSite: Void InitializeCefInternal()

Download the Required Runtime

If ARC cannot initialize the Chromium Embedded Browser, install the Visual C++ Redistributable runtime below.