my output csv file is empty

[sabamohammadi]

I have just installed OpenSmile and I tried to exract some features using the line below, and ofcourse I modified the pathes:
SMILExtract -C config/demo/demo1_energy.conf -I example-audio/opensmile.wav -O opensmile.energy.csv
(MSG) [2] SMILExtract: openSMILE starting!
(MSG) [2] SMILExtract: config file is: ../config/demo/demo1_energy.conf
(MSG) [2] cComponentManager: successfully registered 102 component types.
(MSG) [2] cComponentManager: successfully finished createInstances (4 component instances were finalised, 1 data memories were finalised)
(MSG) [2] cComponentManager: starting single thread processing loop
(MSG) [2] cComponentManager: Processing finished! System ran for 191 ticks.

but when I open the csv file it is empty