Multiple runs return error

[frankopt]

I tried to do Multiple runs. and when I issue, ' : No such file or directory' return.
/usr/bin/ruby multi-averager frank > stream.txt
: No such file or directory
: No such file or directory
: No such file or directory
: No such file or directory
: No such file or directory
: No such file or directory
: No such file or directory
: No such file or directory
: No such file or directory
: No such file or directory

I have installed ruby and python related package.
pls. help to figure me out.

Frank

[frankopt]

add python in multi-averager and solved.
lines = IO.popen( "cat #{file} | python stream-graph.py" ).readlines