I'm really glad you reply to the posts here. First of all I've tried multiple times on Slicer windows edition but from beginning I was receiving errors then I've installed it in Linux. My mistake was that I didn't change the path directory Correctly, however I was receiving results and that was strange for me. Again I implemented each step more carefully and I found out I inserted the directory path by mistake. That was all.

I have another question, How can I use MANCOVA or statistical analysis on my results in slicer? is there any extension? Or I should use the outputs for further analyzing in MATLAB or R ?

Thanks a lot.