Hi, I've created a message for my package named Status and in the code, I had the following function: void pullPickCallback(bookbot::Status s) { ... } When compiling the file, I got the following error: /opt/ros/cturtle/stacks/lis/bookbot/src/driver.cpp:57: error: variable or field ‘pullPickCallback’ declared void /opt/ros/cturtle/stacks/lis/bookbot/src/driver.cpp:57: error: expected unqualified-id before ‘int’ Line 57 is the one I copied above. Changing the message name from Status to something else fixed the problem. Is Status reserved name in ROS for something or did I just bump into a really strange bug? Thanks, Sanja