can not read /etc/udev/rules/d/50-udev.rules

[Edison, Arul (GE Healthcare)]

Hi everyone,
        With Helios 6.3 , I am getting this below error intermittently when I 
reboot my PC
can not read /etc/udev/rules/d/50-udev.rules

        Suggestion is  welcome
Regards,
Arul