====== Rhino 5: Error "Rhino is unable to connect to ZooClient.dll" =====
======(Rhino 5 for Windows) ======

> **Summary:** //Rhino is unable to connect to ZooClient.dll//
> **Related installation help:** //[[/rhino/installproblems|Troubleshooting Rhino 5 Installation]]//

=====Problem=====

Rhino 5 shows a message **Rhino is unable to connect to ZooClient.dll. Rhino will not run.** In the several known cases, this problem seems to only happen with Rhino 5 64-bit on Windows 8. Rhino 5 32-bit is not affected in these cases.\\ {{http://wiki.mcneel.com/_media/rhino/5/zooclient_dll.png}}


=====Cause=====

Rhino 5 doesn't have enough permission privileges to interact with the ZooClient.dll.

\\

====Solution 1====
  - Download and install the Rhino 5 full version from http://www.rhino3d.com/download. This includes an updated installer and the current Service Release. The original DVD release of Rhino 5 did not include these improvements.

====Solution 2====
  - Right-click on the Rhino 5 shortcut icon on the desktop and select **Properties**.\\ <color #999999>The changes will be applied to the Rhino 5 executable, not the shortcut itself.</color> 
  - On the **Compatibility** tab, select **Windows 7** compatibility mode.
  - Check **Run this program as an administrator**.\\ {{http://wiki.mcneel.com/_media/rhino/5/rhino5x64properties.png?300}}
  - Click **OK**.

{{tag>:zoo:zoo5 rhino5 rhino5installationerror_en}}