Documentation forKiwi CatTools

Troubleshoot: Remote Desktop Systems

CatTools may experience problems starting the Client threads when running on machines that use remote desktop software.

KiwiCatTools has been successfully tested on RealVNC 4.3.2, TightVNC 1.3.9, and PCAnywhere 12.1. With the exception of Windows Vista, no issues occurred during the testing of CatTools.

RealVNC and TightVNC

Some older versions of VNC can cause issues with starting the client threads. Versions of VNC software older than TightVNC 1.3.9 and RealVNC 4.3.2 interrupt the Windows system and cause the client to only start one thread.


  1. SolarWinds recommends upgrading your current version of VNC.
  2. If you are unable to upgrade your VNC software, you can attempt to change the registry settings. Use RegEdit to set the use_Deferral setting to 0.

    SolarWinds strongly recommends that you back up your registry before making any edits to your system registry. You should only edit the registry if you are experienced and confident in doing so. Using a registry editor incorrectly can cause serious issues with your operating system, which could require you to reinstall your operating system to correct them. SolarWinds cannot guarantee resolutions to any damage resulting from making registry edits.

  3. Key: HKEY_CURRENT_USER\Software\ORL\VNCHooks\Application_Prefs\CatTools_Client.exe
    Set Dword: use_Deferral to 0
    Key: HKEY_CURRENT_USER\Software\ORL\VNCHooks\Application_Prefs\CatTools.exe
    Set Dword: use_Deferral to 0