New groovy install roscore error

edit

Did a full-desktop install on a netbook and workstation Ubuntu 12.04 that had a working Fuerte (/opt/ros/fuerte/ folder still there) & modified the .bashrc to only source groovy:

source /opt/ros/groovy/setup.bash
export ROS_HOSTNAME=192.168.2.18
export ROS_MASTER_URI=http://192.168.2.32:11311   
export ROS_PACKAGE_PATH=~/ros_workspace:$ROS_PACKAGE_PATH

roscore gives following error:

$~/ros_workspace$ roscore
WARNING: unable to configure logging. No log files will be generated
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

Cannot locate [roslaunch]Invalid <param> tag: Cannot load command parameter [rosversion]: command [rosversion roslaunch] returned with code [1].

Param xml is

Environment paths only point to groovy folders. Should I delete or move the /opt/ros/fuerte/ folder?

What should I check?