AA office Error: General .NET Exception: Object reference not set to an instance of an object

Hello,

I have Analysis for Office v1.4 SP 5  installed on my machine using Microsoft Office 2007 on Windows 7. I got this error when I launched the AA office "The Launcher is exited with error, see log file for more details.".

The log file text is:

- Error: General .NET Exception: Object reference not set to an instance of an object.

   at com.sap.ip.bi.pioneer.core.launcher.CrLauncherUtils.GetOfficePath(String iClassId)

   at com.sap.ip.bi.pioneer.core.launcher.CrLauncherUtils.StartExcelProcess()

   at com.sap.ip.bi.pioneer.core.launcher.CrLauncherUtils.StartNewExcelApplication(CrOfficeGetterHelper iOfficeGetterHelper)

   at com.sap.ip.bi.pioneer.core.launcher.CrLauncher.StartNewOfficeApplication(CrOfficeGetterHelper iOfficeGetterHelper)

   at com.sap.ip.bi.pioneer.core.launcher.CrLauncher.StartApplication(CrOfficeGetterHelper iOfficeGetterHelper)

   at com.sap.ip.bi.pioneer.addins.launcher.Launcher.Main(String[] args)

This is quite different from error reported by Christopher. Any clue on how to resolve this?