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Hello, I have the similar problem. My error looks like that:

[ERROR] [WallTime: 1449865435.202100] Creation of publisher failed: dimrob_synctimescan
ROS path [0]=/opt/ros/indigo/share/ros
ROS path [1]=/home/copek/catkin_ws/src
ROS path [2]=/home/copek/catkin_test/src
ROS path [3]=/opt/ros/indigo/share
ROS path [4]=/opt/ros/indigo/stacks
ROS path [5]=/home/copek/indigo_workspace/sandbox

catkin_ws and catkin_test are different workspaces I am using, but the one in which is my custom message is not present on that list. My question is what do you mean by sourcing the workspace? If I type the following command

   source /home/copek/catkin_imu/devel/setup.bash

(the location of my catkin), I got the error:

[rosrun] Couldn't find executable named serial_node.py below /opt/ros/indigo/share/rosserial_python

However if I source the following:

source /opt/ros/indigo/setup.bash

I receive the error:

[ERROR] [WallTime: 1449865600.013650] Creation of publisher failed: dimrob_synctimescan
ROS path [0]=/opt/ros/indigo/share/ros
ROS path [1]=/opt/ros/indigo/share
ROS path [2]=/opt/ros/indigo/stacks

Do you have a clue wht may be wrong? Thanks for the answer :)