[ros-users] possible bug: pr2_arm_kinematics wrong md5 after upgrade, strange folders and compile errors on pr2 core packages

Thu Jul 19 18:19:27 UTC 2012

Michael,

I've asked the same question on ROS answers and created a ticket on
code.ros.org.

After some digging I found that the file
arm_navigation/kinematics_msgs/srv_gen/cpp/include/kinematics_msgs/GetPositionIK.h
has md5sum:

6d82fcb918d48c6d8a708bc55e34ace2

However in opt/ros/fuerte/include/kinematics_msgs/GetPositionIK.h it has:

877eea62385e0e095b5756ea4386623d

So I guess some changes are ongoing but packages have been released too
soon! And none of my code can work right now!

Lorenzo

Same goes for the python and lisp files. I don't know why there's these
repetitions of messages but it's creating confusion and mismatching
problems.

On Thu, Jul 19, 2012 at 6:48 AM, Michael Carroll
<carroll.michael at gmail.com>wrote:

> I think that you may have better luck if you ask this question on
> http://answers.ros.org, as per http://ros.org/wiki/Support
>
> Thanks,
>
> ~mc
>
> On Wed, Jul 18, 2012 at 10:09 PM, Lorenzo Riano <
> lorenzo.riano at berkeley.edu> wrote:
>
>> Folks,
>>
>> I've been using pr2_control_utilities<http://ros.org/wiki/pr2_control_utilities>for some time and they are quite robust to changes in msgs and APIs.
>> However today, after an upgrade on fuerte, the md5 of
>> kinematics_msgs/GetPositionIK changed. Although I recompiled my code (it's
>> all python, don't really know if it matters doing rosmake), the problem
>> persisted. I've tried several make clean - make iterations on several
>> packages. Here is the error that pr2_arm_kinematics reported:
>>
>> client wants service /pr2_right_arm_kinematics/get_ik to have md5sum
>> 877eea62385e0e095b5756ea4386623d, but it has
>> 6d82fcb918d48c6d8a708bc55e34ace2. Dropping connection.
>>
>> However if I do *rossrv md5 kinematics_msgs/GetPositionIK* I get
>> 877eea62385e0e095b5756ea4386623d, so I though the client was right and the
>> service provider pr2_arm_kinematics had the wrong md5. Since this is
>> obtained using apt-get I assumed that it was correctly compiled and
>> linked.I tried to manually compile it, but I got the error:
>>
>> In file included from
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/include/pr2_arm_kinematics/pr2_arm_ik.h:40:0,
>>                    from
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/src/pr2_arm_ik.cpp:34:
>>
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/include/pr2_arm_kinematics/pr2_arm_kinematics_utils.h:104:24:
>> error: ‘arm_navigation_msgs’ has not been declared
>>
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/include/pr2_arm_kinematics/pr2_arm_kinematics_utils.h:104:57:
>> error: ‘robot_state’ was not declared in this scope
>>
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/include/pr2_arm_kinematics/pr2_arm_kinematics_utils.h:105:24:
>> error: expected primary-expression before ‘const’
>>
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/include/pr2_arm_kinematics/pr2_arm_kinematics_utils.h:105:78:
>> error: expression list treated as compound expression in initializer
>> [-fpermissive]
>>
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/src/pr2_arm_ik.cpp:
>> In member function ‘void
>> pr2_arm_kinematics::PR2ArmIK::addJointToChainInfo(boost::shared_ptr<const
>> urdf::Joint>, kinematics_msgs::KinematicSolverInfo&)’:
>>
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/src/pr2_arm_ik.cpp:127:3:
>> error: ‘arm_navigation_msgs’ has not been declared
>>
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/src/pr2_arm_ik.cpp:127:36:
>> error: expected ‘;’ before ‘limit’
>>
>> /opt/ros/fuerte/stacks/pr2_kinematics/pr2_arm_kinematics/src/pr2_arm_ik.cpp:129:3:
>> error: ‘limit’ was not declared in this scope
>>   make[3]: *** [CMakeFiles/pr2_arm_kinematics_lib.dir/src/pr2_arm_ik.o]
>> Error 1
>>
>> so something really strange is going on.
>>
>> The kinematics_msgs folder only has the content:
>>
>> cmake  manifest.xml  msg  srv
>>
>> And the generated messages are somewhere else, namely
>> /opt/ros/fuerte/lib/python2.7/dist-packages/kinematics_msgs/srv. There if
>> open _GetPositionIK.py I get:
>>
>> _md5sum = "bf9ee33930d9eaff390b8af4a213ba62"
>>
>> BUMP! What is the right md5? What am I doing wrong?
>>
>> Lorenzo
>>
>> --
>> Lorenzo Riano, PhD
>> Research Scientist
>> EECS
>> University of California Berkeley
>> Berkeley, CA
>> 94720
>>
>> email: lorenzo.riano at berkeley.edu
>> skype: lorenzo.riano
>>
>>
>>
>>
>> _______________________________________________
>> ros-users mailing list
>> ros-users at code.ros.org
>> https://code.ros.org/mailman/listinfo/ros-users
>>
>>
>
>
> --
> Michael Carroll
> http://mjcarroll.net | carroll.michael at gmail.com | 513.407.1337
>
>
> _______________________________________________
> ros-users mailing list
> ros-users at code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users
>
> --
> Lorenzo Riano, PhD
> Research Scientist
> EECS
> University of California Berkeley
> Berkeley, CA
> 94720
>
> email: <https://code.ros.org/mailman/listinfo/ros-users>
> lorenzo.riano at berkeley.edu
> skype: lorenzo.riano
>
>
>
>
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