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problem in rviz

when i launched my 5 dof robot arm urdf model in rviz its showing no transform between link 1 to link4.. but transform is ok for link0 and link5...urdf parsed ok. Also in the terminal it shows

root@psg-OptiPlex-390:/opt/ros/electric/stacks/al5b_arm# rosrun rviz rviz -d idk.vcg

(rviz:2928): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(rviz:2928): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(rviz:2928): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(rviz:2928): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", the inverse kinematics shows a result when i do rosrun hitec get_ik root@psg-OptiPlex-390:/opt/ros/electric/stacks/al5b_arm# rosrun hitec get_ik can anybody explain the problem

problem in rviz

when i launched my 5 dof robot arm urdf model in rviz its showing no transform between link 1 to link4.. but transform is ok for link0 and link5...urdf parsed ok. Also in the terminal it shows

root@psg-OptiPlex-390:/opt/ros/electric/stacks/al5b_arm# rosrun rviz rviz -d idk.vcg

(rviz:2928): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(rviz:2928): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(rviz:2928): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(rviz:2928): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap", the inverse kinematics shows a result when i do rosrun hitec get_ik root@psg-OptiPlex-390:/opt/ros/electric/stacks/al5b_arm# rosrun hitec get_ik can anybody explain the problem