Hello,
I'm trying to use the robot_localization package for sensor fusion. I've got three sensors: IMU, odometry and GPS.
I was first trying to work with the configuration I've found here:
[link to other question](http://answers.ros.org/question/215904/robot_localization-failed-to-transform-warning/?comment=252296#post-id-252296)
I downloaded the files from [here](https://drive.google.com/file/d/0BzZeubT6hZReNGthQ2NRRjBaVjQ/view)
Unfortunately if I execute the launch file I first got these errors:
[ WARN] [1484753899.869852461, 1440023596.548412649]: Could not obtain transform from /gps to base_footprint. Error was Invalid argument "/gps" passed to lookupTransform argument source_frame in tf2 frame_ids cannot start with a '/' like:
As suggested from @tom-moore in an [answer](http://answers.ros.org/question/215904/robot_localization-failed-to-transform-warning/?comment=252296#post-id-252296) I changed the frame_id from /gps to gps
But just the error message changed:
[ WARN] [1484754315.316805588, 1440023620.550000278]: Could not obtain transform from gps to base_footprint. Error was "gps" passed to lookupTransform argument source_frame does not exist.
EDIT:
I can reproduce the error on different computers. I was setting up ubuntu with a clean ros installation without any success. As a result I get the same errors.
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