Ev3 manager crashes

[Omarev3]

Hii, i have managed to control the ev3 with the H4R_EV3, however while working und runing line follower programs the Ev3 manager crashes and give me this error. anyone has idea what causes this!!???

getFilePTR opening: /sys/class/tacho-motor/motor1/speed_regulation 0x121d48
ev3_manager_node: /data/Daten/Projekte/ROS_EV3/build/tmp/sysroots/ev3dev/usr/include/boost/smart_ptr/shared_ptr.hpp:648: typename boost::detail::sp_member_access::type boost::shared_ptr::operator->() const [with T = ros::Connection; typename boost::detail::sp_member_access::type = ros::Connection*]: Assertion `px != 0' failed.
Aborted