"playground.py install" cause TypeError in SConstruct

I met 1 TypeError( and 2 warnings) when ./playground.py install --flavour=dbg
What's wrong?
Thank you.

[hoge@localhost myOpenWNS]$ ./playground.py install --flavour=dbg
Executing: scons dbg --warn=no-missing-sconscript -j 1 default
scons: Reading SConscript files ...

scons: warning: The env.SourceSignatures() method is deprecated;
 convert your build to use the env.Decider() method instead.
File "/home/hoge/Works/OpenWNS/myOpenWNS/SConstruct", line 11, in <module>

scons: warning: The env.TargetSignatures() method is deprecated;
 convert your build to use the env.Decider() method instead.
File "/home/hoge/Works/OpenWNS/myOpenWNS/SConstruct", line 12, in <module>

Checking for icecc compiler...yes
...
Checking for C library boost_filesystem-mt... yes
TypeError: 'NoneType' object is not iterable:
  File "/home/hoge/Works/OpenWNS/myOpenWNS/SConstruct", line 156:
    libname,srcFiles,headers,pyconfigs,dependencies = SConscript(os.path.join(project.getDir(), 'config', 'libfiles.py'))