RTT Setting中，ymodem无法通过Settings加入工程？

    D:\RT-ThreadStudio>cd /d D:\RT-ThreadStudio\workspace\linkrtt 
    D:\RT-ThreadStudio\workspace\linkrtt>scons --useconfig=.config 
    scons: Reading SConscript files ...
    ==============================> updating
    Package path: D:\RT-ThreadStudio\workspace\linkrtt\packages\wiznet-latest
    Git root: D:/RT-ThreadStudio/workspace/linkrtt
    Error: Not currently in a git root directory, cannot switch upstream.
    Operation failed.
    AttributeError: 'NoneType' object has no attribute 'split':
    DoBuilding(TARGET, objs)
    EndBuilding(target, program)
    GenTargetProject(program)
    TargetEclipse(Env, GetOption('reset-project-config'), GetOption('project-name'))
    UpdateCproject(env, project, excluding, reset, prj_name)
    HandleExcludingOption(entry, sourceEntries, excluding)
    old_excluding = entry.get('excluding').split('|')