Error while loading V-REP ROS plugin

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Hello friends,

I am facing while setting V-REP with ROS Interface. Actually, I'm getting the following error while starting V-REP:

Plugin 'Ros': loading...
[FATAL] [1482517361.238603357]: ROS_MASTER_URI is not defined in the environment. Either type the following or (preferrably) add this to your ~/.bashrc file in order set up your local machine as a ROS master:
export ROS_MASTER_URI=http://localhost:11311
then, type 'roscore' in another shell to actually launch the master program.

I've tried to set the environment variable ROS_MASTER as in error message but it didn't solve the problem.

I'm using V-REP PRO EDU V3.3.2 rev3 ; ROS INDIGO; UBUNTU 14.04

I'd appreciate any help to solve this issue.

Best regards,