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ClearCase support for Microsoft Windows 7 Operating system

Preventive Service Planning


Does IBM Rational ClearCase support the Microsoft Windows 7 operating system?


Rational ClearCase clients are supported on Windows 7.

IBM Rational ClearCase version 7.1.1 added support for Microsoft Windows 7 with certain known issues and limitations as listed below. Some limitations have been removed in ClearCase 7.1.2. Refer to the Limitations section below for further information.

Note: Microsoft Windows 7 is supported with ClearCase 7.1.1 and later. Windows 7 SP1 (supported in or or later) is recommended. There are no plans to provide support in earlier ClearCase versions.

IMPORTANT: Before reviewing the following table, refer to the Known Issues and Limitations sections below for a list of known restrictions and limitations with the release of ClearCase support on Windows 7. ClearCase 8.0 support data for the table below has been incorporated into System Requirements for ClearCase 8.0.

Operating System



Windows 7

Professional Edition

Enterprise Edition

Ultimate Edition


64-bit *

CCRC Eclipse IDE (plug-in) 7.1.1



Requires Eclipse and JRE versions that support Windows 7.

Review CCRC System Requirements

**CCRC RCP Client 7.1.1




(see Limitations section below)

Review CCRC System Requirements
Change Management (CM) Server 7.1.1




CM Server is not supported
Global Monitor 7.1.1
Refer to technote 1415015 for supported platform and version information.
* IMPORTANT: IBM Rational License Server (FLEXlm) licensing only supports running in 32-bit mode in 64-bit architectures. Refer to technote 1265239 for further details. Review technote 1128958 for more details about Atria Licensing if required.

** ClearCase Remote Client (CCRC) Rich Client Platform (RCP) is also known as the stand-alone CCRC client.

Note: For the purposes of this technote, ClearCase Server is defined as a host storing VOBs. You can store views on a Client. With respect to MultiSite, this installation is designed for servers only. Clients do not need MultiSite installed to access replicated VOBs.

Known Issues:

  • When installing ClearCase 7.1.1 on Windows 7, IBM Installation Manager will warn that the operating system is unsupported:

    You are attempting to install on an unsupported operating system.

    Resolution : You can ignore this warning and continue to install the product. This issue is fixed in a subsequent ClearCase 7.1.1 fix pack.

  • When running ClearCase 7.1.2 or 8.0 with UAC enabled, certain command line operations which require administrator privilege will return errors even when run by a user who is in the Administrators group.

    Some examples of such commands and the ensuing errors are:

    cleartool getcache -mvfs -reset
    cleartool: Error:  Unable to enable MVFS privileges

    cleartool setcache -mvfs -persistent_only { ... cache value seting(s) ...}
    cleartool: Error: Unable to set persistent MVFS parameters: error detected by ClearCase subsystem.

    cleartool setcache -mvfs { ... cache value seting(s) ...}
    cleartool: Warning: One or more requested parameters affect other cache values that cannot be changed until you make the changes persistent and restart ClearCase.
    cleartool: Error: Unable to enable MVFS privileges

    mvfslog.exe  { ... logging options  ...}
    mvfslog.exe: Error: Unable to enable MVFS privileges.

    mvfsstat.exe { ... statistics options ... }

    mvfsstat.exe:  Unable to enable MVFS privileges

    Password: { ... }
    rgy_passwd: Error: Error 5 setting registry password in the NT registry.

    Workaround: These commands will succeed if they are invoked from a cmd shell that was started with the "Run as administrator" option.

Refer to
technote 1444765 for a list of additional known issues that can occur when using ClearCase with User Account Control (UAC).

NOTE: Support for UAC and BitLocker on Windows 7 was added with ClearCase 7.1.2.


    • ClearCase version 7.1.1 clients are supported in Windows 7 with UAC turned off.

      Refer to technote 1399262 Windows UAC support and ClearCase for further information.
    • ClearCase version 7.1.1 clients are supported in Windows 7 with BitLocker turned off.

      Refer to technote 1421258 BitLocker support with ClearCase on Windows for further information.

    • The Eclipse version bundled with the CCRC RCP in 7.1.x, which is Eclipse, does not officially support Windows 7. CCRC RCP 7.1.x is supported on Windows 7 to the extent possible given the constraints of Eclipse support. The Eclipse version bundled with CCRC and ClearTeam Explorer (CTE) RCP in version 8.0, which is Eclipse 3.6.2, is officially supported on Windows 7.

Request for enhancement (RFE) RATLC01282967 was opened requesting ClearCase 7.x support for Microsoft Windows 7.

You can view the status or post comments for RFE RATLC01282967 on the Rational Software RFE Community Web site.

Rational RFE Community homepage

Refer to the Rational RFE Community homepage for details and status of Requests for Enhancements for Rational products.

Updated information about ClearCase system requirements including operating system support for the various ClearCase versions is available in the following document:

Document # 7008776 Rational ClearCase System Requirements List

Installing Rational ClearCase on Microsoft Windows 7
  • Installing ClearCase:

Change History

Change History
5 December 2011Updated for 8.0
05 October 2010Updated UAC and BitLocker support information
Added additional known issue
23 August 2010Added reference to technote regarding Known issues with UAC
6 May 2010Replaced global monitor details with technote reference
5 May 2010Changed FLEXlm 64-bit support note
3 May 2010Updated note to indicate non support for pre ClearCase 7.1.1 versions
16 March 2010Changed CCRC RCP client support status to Yes and updated comments and limitations
24 February 2010Updated CCRC limitations regarding RCP
19 February 2010Added support limitations and known issues

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Document Information

Modified date:
23 June 2018