Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Revision history [back]

Try

$ rm -rf CMakeCache.txt CMakeFiles cmake_install.cmake msg_gen srv_gen src/myPackage
$ cmake .
$ rosmake

That has worked for me a bunch of times when doing exactly what you are trying to do. Basically, try to remove all auto-generated files and then build again.

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.