Embarcadero RAD Studio XE2 编译异常有关问题

Embarcadero RAD Studio XE2 编译错误问题。
刚刚下载 Embarcadero RAD Studio XE2 安装成功挺高兴。
做一下测试添加VCL Forms Application 编译。
编译通不过错误提示是
[Error Error] Invalid PLATFORM variable "BPC". PLATFORM must be one of the following: "Win32", "Win64", or "OSX32". If PLATFORM is defined by your system's environment, it must be overridden in the RAD Studio IDE or passed explicitly on the command line to MSBuild; e.g., /p:Platform=Win32.

我用的系统是winxp professional win32系统。
请问怎样解决呢？




[解决办法]
把BPC的环境变量删除