Hi Matt,<div><br></div><div>It looks like you&#39;re trying to build packages in a directory that you don&#39;t have permission to do so in.</div><div><br></div><div>The .deb install of ROS puts pre-built packages in /opt/ros/cturtle/stacks. If you are downloading sources for other packages, you will want to put them in a directory that you have rwx permission in, and add that directory to your ROS_PACKAGE_PATH.</div>



<div><br></div><div>Hope that helps,</div><div>Nate<br><br><div class="gmail_quote">On Sun, Nov 21, 2010 at 22:14, Matt McLellan <span dir="ltr">&lt;<a href="mailto:mattmclel@gmail.com" target="_blank">mattmclel@gmail.com</a>&gt;</span> wrote:<br>



<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<div><br></div><div>I&#39;m getting the following error message when I try to compile a package that uses serial_port_node:</div>



<div><br></div><div><div> mkdir -p bin</div><div>  cd build &amp;&amp; cmake -Wdev -DCMAKE_TOOLCHAIN_FILE=`rospack find rosbuild`/rostoolchain.cmake  ..</div>
<div>  [rosbuild] Building package serial_port_node</div><div>  [rosbuild] Including /opt/ros/cturtle/ros/core/rospy/cmake/rospy.cmake</div><div>  [rosbuild] Including /opt/ros/cturtle/ros/core/roscpp/cmake/roscpp.cmake</div>




<div>  [rosbuild] Including /opt/ros/cturtle/ros/core/roslisp/cmake/roslisp.cmake</div><div>  [rosbuild] Error from calling to Python to set the mtime on /opt/ros/cturtle/stacks/siue-ros-pkg/siue_utils/serial_port_node/srv_gen/generated:</div>




<div>  </div><div>  CMake Error at /opt/ros/cturtle/ros/core/rosbuild/public.cmake:758 (message):</div><div>    [rosbuild] Failed to set mtime; aborting</div><div>  Call Stack (most recent call first):</div><div>    CMakeLists.txt:20 (rosbuild_gensrv)</div>




<div>  </div><div>  </div><div>  -- Configuring incomplete, errors occurred!</div><div>  CMake Error: Unable to open cache file for save. /opt/ros/cturtle/stacks/siue-ros-pkg/siue_utils/serial_port_node/build/CMakeCache.txt</div>




<div>  CMake Error: : System Error: Permission denied</div></div><div><br></div><div><br></div><div><span style="font-family:arial, sans-serif;font-size:13px;border-collapse:collapse">I&#39;m using cturtle with the serial_port_node package, output from &#39;uname -a&#39;: Linux robot-brain 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:26:08 UTC 2010 i686 GNU/Linux</span></div>




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<br></blockquote></div><br></div>