Hello...
I am using it as follows.
1. Ubuntu 16.04
2. rosdistro: kinetic
3. rosversion: 1.12.14
Error is :
admin@lattepanda:~/catkin_ws$ roslaunch seven_dof_arm_gazebo grasp_generator_server.launch
... logging to /home/admin/.ros/log/35fbb6cc-5a8d-11e9-ad6d-805e4fb50e69/roslaunch-lattepanda-13454.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.
started roslaunch server http://lattepanda:38435/
SUMMARY
========
PARAMETERS
* /moveit_simple_grasps_server/base_link: base_link
* /moveit_simple_grasps_server/end_effector: gripper
* /moveit_simple_grasps_server/gripper/end_effector_name: gripper
* /moveit_simple_grasps_server/gripper/end_effector_parent_link: gripper_roll_link
* /moveit_simple_grasps_server/gripper/grasp_pose_to_eef: [0.0, 0.0, 0.0]
* /moveit_simple_grasps_server/gripper/grasp_pose_to_eef_rotation: [0.0, 0.0, 0.0]
* /moveit_simple_grasps_server/gripper/grasp_posture: [1.0, 1.0]
* /moveit_simple_grasps_server/gripper/grasp_time_from_start: 4.0
* /moveit_simple_grasps_server/gripper/joints: ['finger_joint1',...
* /moveit_simple_grasps_server/gripper/postplace_time_from_start: 4.0
* /moveit_simple_grasps_server/gripper/pregrasp_posture: [0.0, 0.0]
* /moveit_simple_grasps_server/gripper/pregrasp_time_from_start: 4.0
* /moveit_simple_grasps_server/group: arm
* /rosdistro: kinetic
* /rosversion: 1.12.14
NODES
/
moveit_simple_grasps_server (moveit_simple_grasps/moveit_simple_grasps_server)
ROS_MASTER_URI=http://10.1.58.189:11311
process[moveit_simple_grasps_server-1]: started with pid [13471]
[ERROR] [1554792667.209244017]: Grasp configuration parameter `pregrasp_time_from_start` missing from rosparam server. Did you load your end effector's configuration yaml file? Searching in namespace: /moveit_simple_grasps_server/right
[moveit_simple_grasps_server-1] process has died [pid 13471, exit code -5, cmd /home/admin/catkin_ws/devel/lib/moveit_simple_grasps/moveit_simple_grasps_server __name:=moveit_simple_grasps_server __log:=/home/admin/.ros/log/35fbb6cc-5a8d-11e9-ad6d-805e4fb50e69/moveit_simple_grasps_server-1.log].
log file: /home/admin/.ros/log/35fbb6cc-5a8d-11e9-ad6d-805e4fb50e69/moveit_simple_grasps_server-1*.log****
all processes on machine have died, roslaunch will exit
shutting down processing monitor...
... shutting down processing monitor complete
done
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