Hi to all, I trying to reproduce the Timer Package from http://www.ros.org/wiki/roscpp_tutorials/Tutorials/Timers and these are the commands i entered. 1. roscreate -pkg --xcproj Timer roscpp std_msgs 2. rospack export --lan=cpp --attrib=cflags Timer 3. rospack export --lan=cpp --attrib=flags Timer 4. rosmake --rosdep --install But this following errors occurs ---------------------------------------------------------------------------------------------------------------------------------------------------- Usage: rosmake [options] [PACKAGE]... rosmake: error: ambiguous option: --rosdep (--rosdep-install, --rosdep-yes?) Traceback (most recent call last): File "/opt/ros/cturtle/ros/bin/rosmake", line 65, in if rma.main(): File "/opt/ros/cturtle/ros/tools/rosmake/src/rosmake/rosmake.py", line 706, in main options, args = parser.parse_args() File "/usr/lib/python2.6/optparse.py", line 1396, in parse_args self.error(str(err)) File "/usr/lib/python2.6/optparse.py", line 1578, in error self.exit(2, "%s: error: %s\n" % (self.get_prog_name(), msg)) File "/usr/lib/python2.6/optparse.py", line 1568, in exit sys.exit(status) SystemExit: 2 --------------------------------------------------------------------------------------------------------------------------------------------------- What does this error means? if i change the command to rosmake only, -- Configuring incomplete, errors occurred! --------------------------------------------------------------------------------------------------------------------------------------------------------------------} [ rosmake ] Output from build of package Timer written to: [ rosmake ] /home/snoopy/.ros/rosmake/rosmake_output-20100823-143146/Timer/build_output.log [rosmake-1] Finished <<< Timer [FAIL] [ 1.16 seconds ] [ rosmake ] Halting due to failure in package Timer. [ rosmake ] Waiting for other threads to complete. [ rosmake ] Results: [ rosmake ] Built 10 packages with 1 failures. [ rosmake ] Summary output to directory [ rosmake ] /home/snoopy/.ros/rosmake/rosmake_output-20100823-143146 ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- how should i address these 2 problems? With thanks, Zhiping