#1 GDK error while running malic

[Sterops]

I have a problem while running malicsampling program (debug mode enabled). A window opens, then closes immediately and this error message is printed on the console :
HIGHGUI ERROR: V4L: getting property #6 is not supported
HIGHGUI ERROR: V4L: getting property #5 is not supported
dump propaty 0,004883 0,003662 -1,000000 -1,000000
Gdk-ERROR **: BadMatch (invalid parameter attributes)
serial 899 error_code 8 request_code 62 minor_code 0
Gdk-ERROR **: BadMatch (invalid parameter attributes)
serial 1244 error_code 8 request_code 62 minor_code 0

Have you any suggestion ?

Note : the other programs end up with a
HIGHGUI ERROR: V4L: getting property #6 is not supported
HIGHGUI ERROR: V4L: getting property #5 is not supported
dump propaty 0,004883 0,003662 -1,000000 -1,000000
xmlfile name is /home/user/Documents/face_recognition/malic-0.0.9.1/data/gaborrg_jet.xml
Error reading mask file: /home/user/Documents/face_recognition/malic-0.0.9.1/data/gaborrg_jet.xml.masks line: 0