Hi all! I'm using Ubuntu 12.04 I was trying to follow the tutorial here wiki.ros.org/pcl/Tutorials.

At step 4.1 I don't understand what TOPDIRYOURCATKINHOME is... Intuitively, I believed it was the directory ~/mypcltutorial so I made a try.

After doing that the command catkinmake reported error: **The specified base path "/home/britsk/mypcltutorial" contains a CMakeLists.txt but "catkinmake" must be invoked in the root of workspace.**

I copied the CMakeLists.txt and package.xml files to another place and ran the catkin_make command. It worked and then I restored the files. I'm not sure if this is necessary.

Then I ran: rosrun mypcltutorial example input:=/narrowstereotextured/points2. I received another error: rosrun mypcltutorial example input:=/narrowstereotextured/points2

I looked around and found sth relating to rosws, so I tried rosws set ~/mypcltutorial and got the error ERROR in config: Command requires a target workspace

Please tell me how to make this tutorial work.