What does this publish error mean? [closed]

edit

I upgraded from Fuerte to Hydro and now get this error. This message worked under Fuerte. Can someone explain what this error message does not like. The message ArmShoulder is a std_msgs/Float64 format. If I manually execute: "rostopic pub -1 ArmShoulder/command std_msgs/Float64 -- 1" it works fine.

file = /opt/ros/hydro/include/ros/publisher.h
line = 115
cond = impl_->md5sum_ == "*" || std::string(mt::md5sum<M>(message)) == "*" || impl_->md5sum_ == mt::md5sum<M>(message)
message =