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I corrected that, deleted (Trash) macports, uninstalled Xcode 4.2.1, installed a clean Xcode 4.3 and Command Line Tools, and still fails as follows:

[ rosmake ] Generating Install Script using rosdep then executing. This may take a minute, you will be prompted for permissions. . . Traceback (most recent call last):

File "/Users/Ross/ros/ros/tools/rosdep/src/rosdep/", line 427, in __init__ pop = subprocess.Popen(['port'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/", line 672, in __init__ errread, errwrite)

File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/", line 1202, in _execute_child raise child_exception

OSError: [Errno 2] No such file or directory There was an error running macports, make sure it is installed properly. Traceback (most recent call last):

File "/usr/local/bin/rosinstall", line 16, in <module> sys.exit(not rosinstall_main(sys.argv))

File "/Library/Python/2.7/site-packages/rosinstall/", line 213, in rosinstall_main options.catkinpp)

File "/Library/Python/2.7/site-packages/rosinstall/", line 96, in cmd_generate_ros_files subprocess.check_call("source %s && rosmake ros%s --rosdep-install%s" % (os.path.join(path, ''), ros_comm_insert, rosdep_yes_insert), shell=True, executable='/bin/bash') File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/", line 504, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command 'source /Users/Ross/ros/ && rosmake ros ros_comm --rosdep-install' returned non-zero exit status 255

Appreciate you further assistance.