【SDK 3.0】Failed to get rootstrap list. while building Native projects by CLI

Hello:

        As the Native projects throw out a java.lang.StackOverflowError, I read the Help Contents carefully and find a new way to create Native projects. But I got a new error while building.

        1. Add path to the end of /etc/profile as below:
# tizen command line interface
TIZEN_SDK_HOME=/home/user/tizen-sdk
PATH=$TIZEN_SDK_HOME/tools/ide/bin:$PATH
export TIZEN_SDK_HOME
export PATH

        2. Execute this command to active the change:
source /etc/profile

        3. cd to workspace.
        4. To create an empty project using CLI, use the following command:
native-gen -s empty

        5. To build the application using CLI, use the following command:
cd empty/CommandLineBuild
native-make

        6. Then I throw out errors:
PLATFORM_NAME   : 
PLATFORM_VER   : Mobile 3.0
ARCHITECTURE   : i386
TOOLCHAIN   : LLVM-3.1
PROJECT_TYPE   : app
PROJECT_PATH   : /home/user/workspace/tizen3.0/nEmpty
SDK_PATH   : /home/user/tizen-sdk
APPLICATION_ID   : wYzxbfMsUo
Error: Failed to get rootstrap list.
Error: Failed to create target.

        Can anybody help me to fix this error?
        Thank you very much!