EGLFS errors on my raspberry pi

[Dhanush Nair]

Hi all,

I am new with QT an this is my very firsy GUI that I am developing in QT . I started with simple applications and it is working fine , but I always get these warnings.Some times it crashes my application.
*
EGLFS: Unable to query physical screen size, defaulting to 100 dpi.
EGLFS: To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
EGLFS: Unable to query screen depth, defaulting to 32.
EGLFS: To override, set QT_QPA_EGLFS_DEPTH.
*

Also when I develop multiple GUIs in my project and when i switch between them I get
*
EGL Error : Could not create the egl surface: error = 0x3003*

and my application crashes.

Please help :(

I am using QT2.6 and raspberry pi Model B 512MB

Thanks in advance.

Regards,
Dhanush