Unable to find custom install operation class "com.ibm.cic.agent.win32.registerUninstall.RegisterUninstall" - RAD on WIndows 7

I have been trying to update Installation Manager on Windows 7 64-bit machine but I was getting below error-

Unable to find custom install operation class "com.ibm.cic.agent.win32.registerUninstall.RegisterUninstall" for installable unit: com.ibm.cic.agent.win32.uninstaller.AddRemoveProgramIU 

java.lang.ClassNotFoundException: com.ibm.cic.agent.win32.registerUninstall.RegisterUninstall

java.net.URLClassLoader.findClass(URLClassLoader.java:493)

java.lang.ClassLoader.loadClass(ClassLoader.java:607)

java.lang.ClassLoader.loadClass(ClassLoader.java:573)

com.ibm.cic.agent.core.commonNativeInstallAdapter.InvokeInstallOperation.loadCustomOperationClass(InvokeInstallOperation.java:175)

com.ibm.cic.agent.core.commonNativeInstallAdapter.InvokeInstallOperation.invoke(InvokeInstallOperation.java:103)

com.ibm.cic.agent.core.commonNativeInstallAdapter.InvokeInstallOperation.perform(InvokeInstallOperation.java:61)

com.ibm.cic.agent.core.AbstractInstallOperation.perform(AbstractInstallOperation.java:85)

com.ibm.cic.agent.core.InstallTransaction.performOperation(InstallTransaction.java:84)

com.ibm.cic.agent.core.InstallContext.performOperation(InstallContext.java:594)

After some R&D, I figure out four jars were missing in path C:\Program Files (x86)\IBM\Installation Manager\eclipse\lib 

Jars names are -

com.ibm.cic.agent.gdiPlus.jar

com.ibm.cic.agent.nativeAdminFixup.jar

com.ibm.cic.agent.win32.registerAgent.jar

com.ibm.cic.agent.win32.registerUninstall.jar

By placing this above jars on mentioned path, I was able to update Installation Manager.