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64-bit Windows Explorer is not displaying ClearCase menus

Technote (troubleshooting)


This technote identifies an issue that can occur where IBM Rational ClearCase context menus are not displayed when using 64-bit Microsoft Windows Explorer.


Problem Scenario:

  1. Open 64-bit Windows Explorer
  2. Navigate to the MVFS drive (M:\ by default)
  3. Right click a directory in a view to see if the ClearCase menu appears.


Windows Explorer 64-bit does not list the ClearCase menus.


This was reported as defect APAR PK36107 which has since been closed. ClearCase is a 32-bit application and the ClearCase and Windows Explorer integration will only work in a 32-bit Windows Explorer.

Change request (RFE) RATLC01322564 (delivered in ClearCase versions and was logged requesting a change to the behavior to include 64-bit shell extension for 64-bit Windows Explorer to the current ClearCase application.

Refer to technote 1247988 Known limitations using Rational ClearCase on 64-bit Windows platforms for important information about limitations when hosting ClearCase on 64-bit Windows platforms.

Resolving the problem

RFE RATLC01322564 has been resolved and the ClearCase integration with 64 bit Windows Explorer is available in ClearCase versions and

Refer to Microsoft article 895561 Some Windows Explorer extensions and some Control Panel items are not displayed on computers that are running an x64-based version of Windows for information about a workaround that will allow you to use the 32-bit version of Windows Explorer.


  • For Microsoft Windows XP and Windows Vista 64-bit

    Use the 32-bit version of Windows Explorer to access ClearCase.

    64-bit Windows machines include some 32-bit binaries by default in the C:\Windows\syswow64 directory, among which is explorer.exe.

    Note: The normal 64-bit Explorer is located here by default: c:\windows\explorer.exe

    You can invoke the 32-bit version by running:

    C:\WINDOWS\SysWOW64\explorer.exe /separate,c:

    The 32-bit Windows Explorer will list the ClearCase menus as expected.

  • For Microsoft Windows 7 or Windows Server 2008 R2 64-bit

    Use ClearCase Explorer

Related information

Creating Shortcut Menu handlers
A Japanese translation is available

Document information

More support for: Rational ClearCase
GUI: Windows Explorer (Integration)

Software version: 7.0,,,,,,,,,, 7.0.1,,,,,,,,,,,,, 7.1,,, 7.1.1,,,,,,,,,, 7.1.2,,,,,, 8.0,

Operating system(s): Windows

Reference #: 1251833

Modified date: 20 March 2014