Error when installing CCRC.NET: The prerequisite software for clearcase visual studio .net integration is not installed

why the error The prerequisite software for clearcase visual studio .net integration is not installed occurs when attempting to install IBM® Rational® ClearCase® Remote Client (CCRC).NET on Microsoft® Windows®.   Symptom If the machine, where the CCRC.NET should be installed is a clean machine with only Visual Studio 2008 installed, the CCRC install of the integration will fail with the following error: The prerequisite software for clearcase visual studio .net integration is not installed

Cause

The install of CCRC.NET for 2005 has not found the entry in the registry denoting the presence of Visual Studio 2005. Note: The original integration was designed for Visual Studio 2005, thus ClearCase checks for the existence of Visual Studio 2005 installed on the host.

Resolving the problem

The integration with Visual Studio 2008 was introduced in ClearCase 7.0.1. The registry key below will enable a new installation of CCRC.NET to work with Visual Studio 2008. Note: This solution contains information about modifying the system registry. Before making any modifications to the Microsoft® Registry Editor, it is strongly recommended that you make a backup of the existing registry. For more information describing how to back up the registry, refer to the Microsoft Knowledge Base article 256986. Open regedit (Start > Run type: regedit) Navigate toHKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0.  Note: This key will have to be created if it does not already exist. Make a new string value InstallDir and enter c:\temp for the value: Click OK, close the registry editor and attempt to install ClearCase. Refer to download document 4017991 Integrate ClearCase, CCRC and ClearQuest 7.0.1 with Visual Studio 2008 for further instructions on how to correctly enable the integration with Visual Studio 2008.