error on connecting to python library

i have a project that has code which will communicate with a python script and call python functions. In the proj file, i've added the includePath for the python header files, and added external python library to the project (python27.a). However the qt compiler gave me an error:

No rule to make target ' /home/pgeng/work/OpenModelica-rev.9876.CSA/OMEdit/OMEditGUI/../../../../../../usr/lib/python2.7/libpython2.a', needed by '../bin/OMEdit'. Stop

What does this mean? How can i fix it??