Unable to grasp

[wmy101]

Hi,

I have installed the Romeo package from source however upon launching the demo, I get this error for both left and right arm.

[ERROR] [1496781935.267402900]: Link base_link has no parent joint
[ERROR] [1496781935.267445201]: Could not load ik
[ERROR] [1496781935.267631609]: Kinematics solver of type 'pr2_arm_kinematics/PR2ArmKinematicsPlugin' could not be initialized for group 'left_arm'
[ERROR] [1496781935.267761706]: Kinematics solver could not be instantiated for joint group left_arm.

Upon attempting to pick an object I get the following:

[ WARN] [1496781854.020676172]: All supplied grasps failed. Retrying last grasp in verbose mode.

[ WARN] [1496781853.967486024]: Fail: ABORTED: No motion plan found. No execution attempted.

Please let me know how I can fix this?

Thanks