# Revision history [back]

I had the same problem today which I manged to resolve and I think this is the best place to give the reasons and solution.

Firstly, when we try: rosdep update

We get the following message, as OP mentions:

ERROR: unable to process source [https://github.com/ros/rosdistro/raw/master/releases/fuerte.yaml]:
Failed to download target platform data for gbpdistro: invalid repo spec in bpdistro data: You must update to a newer rosdep version by calling..sudo apt-get update && sudo apt-get install python-rosdep (make sure to uninstall the pip version on Ubuntu)
updated cache in /home/wagnelib/.ros/rosdep/sources.cache


The solution mentioned in this error message is incomplete (or let's say ambiguous). To me it seems like, "remove pip" and install the python-rosdep. Doing this leads to the following (this is what OP got):

$which rosdep /usr/bin/rosdep$ rosdep --version
0.9.5
$apt-cache policy python-rosdep python-rosdep: Installed: 0.10.11-1 Candidate: 0.10.11-1 Version table: *** 0.10.11-1 0 500 http://packages.ros.org/ros/ubuntu/ precise/main i386 Packages 100 /var/lib/dpkg/status  As can be seen, rosdep version is 0.9.5, whereas the apt-cache policy is for rosdep version 0.10.7-1. That is, although we installed the latest version using apt-get, the detected version is still the old one. What is the cause? The cause is, previous rosdep could only be installed/uninstalled using pip. So, we will have to uninstall the older rosdep using pip (which means, when the original solution said "uninstall the pip version", what was really meant was "uninstall older rosdep using pip"). This is how it would look: $sudo pip uninstall rosdep


Now we can remove "pip" if we like, and we reinstall the newer version of rosdep:

$sudo apt-get remove --purge python-rosdep python-pip  Next, follow the regular steps: $sudo apt-get update && sudo apt-get install python-rosdep
$which rosdep /usr/bin/rosdep$rosdep --version
0.10.11
$apt-cache policy python-rosdep python-rosdep: Installed: 0.10.11-1 Candidate: 0.10.11-1 Version table: *** 0.10.11-1 0 500 http://packages.ros.org/ros/ubuntu/ precise/main i386 Packages 100 /var/lib/dpkg/status  All the versions match now:). Remove the old sources file and perform rosdep init and update : $sudo rm /etc/ros/rosdep/sources.list.d/20-default.list
$sudo rosdep init$rosdep update
Hit https://github.com/ros/rosdistro/raw/master/rosdep/osx-homebrew.yaml
Hit https://github.com/ros/rosdistro/raw/master/rosdep/gentoo.yaml
Hit https://github.com/ros/rosdistro/raw/master/rosdep/base.yaml
Hit https://github.com/ros/rosdistro/raw/master/rosdep/python.yaml
Hit https://github.com/ros/rosdistro/raw/master/rosdep/ruby.yaml
Hit https://github.com/ros/rosdistro/raw/master/releases/fuerte.yaml
Hit https://github.com/ros/rosdistro/raw/master/releases/groovy.yaml
updated cache in /home/race/.ros/rosdep/sources.cache


And there it is, rosdep is ready for use. I hope this is useful.

I had the same problem today which I manged to resolve and I think this is the best place to give the reasons and solution.

Firstly, when we try: rosdep update

rosdep update


We get the following message, as OP mentions:

ERROR: unable to process source [https://github.com/ros/rosdistro/raw/master/releases/fuerte.yaml]:
Failed to download target platform data for gbpdistro: invalid repo spec in bpdistro data: You must update to a newer rosdep version by calling..sudo apt-get update && sudo apt-get install python-rosdep (make sure to uninstall the pip version on Ubuntu)
updated cache in /home/wagnelib/.ros/rosdep/sources.cache


The solution mentioned in this error message is incomplete (or let's say ambiguous). To me it seems like, "remove pip" and install the python-rosdep. Doing this leads to the following (this is what OP got):

$which rosdep /usr/bin/rosdep$ rosdep --version
0.9.5
$apt-cache policy python-rosdep python-rosdep: Installed: 0.10.11-1 Candidate: 0.10.11-1 Version table: *** 0.10.11-1 0 500 http://packages.ros.org/ros/ubuntu/ precise/main i386 Packages 100 /var/lib/dpkg/status  As can be seen, rosdep version is 0.9.5, whereas the apt-cache policy is for rosdep version 0.10.7-1. That is, although we installed the latest version using apt-get, the detected version is still the old one. What is the cause? The cause is, previous rosdep could only be installed/uninstalled using pip. So, we will have to uninstall the older rosdep using pip (which means, when the original solution said "uninstall the pip version", what was really meant was "uninstall older rosdep using pip"). This is how it would look: $sudo pip uninstall rosdep


Now we can remove "pip" if we like, and we reinstall the newer version of rosdep:

$sudo apt-get remove --purge python-rosdep python-pip  Next, follow the regular steps: $sudo apt-get update && sudo apt-get install python-rosdep
$which rosdep /usr/bin/rosdep$rosdep --version
0.10.11
$apt-cache policy python-rosdep python-rosdep: Installed: 0.10.11-1 Candidate: 0.10.11-1 Version table: *** 0.10.11-1 0 500 http://packages.ros.org/ros/ubuntu/ precise/main i386 Packages 100 /var/lib/dpkg/status  All the versions match now:). Remove the old sources file and perform rosdep init and update : $sudo rm /etc/ros/rosdep/sources.list.d/20-default.list
$sudo rosdep init$rosdep update
Hit https://github.com/ros/rosdistro/raw/master/rosdep/osx-homebrew.yaml
Hit https://github.com/ros/rosdistro/raw/master/rosdep/gentoo.yaml
Hit https://github.com/ros/rosdistro/raw/master/rosdep/base.yaml
Hit https://github.com/ros/rosdistro/raw/master/rosdep/python.yaml
Hit https://github.com/ros/rosdistro/raw/master/rosdep/ruby.yaml
Hit https://github.com/ros/rosdistro/raw/master/releases/fuerte.yaml
Hit https://github.com/ros/rosdistro/raw/master/releases/groovy.yaml
updated cache in /home/race/.ros/rosdep/sources.cache


And there it is, rosdep is ready for use. I hope this is useful.