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Fatal error while trying to build map from logged data. (hector SLAM)

asked 2014-09-07 13:48:34 -0500

lffox gravatar image

updated 2014-09-07 15:07:42 -0500

I've been following this tutorial, , but I never got past step 4. My OS version - Ubuntu 14.04 and I'm running ROS Indigo.

I get the following error:

Patrick@grimreaper:~$ rosbag play Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag  --clock

[ INFO] [1410114868.718453773]: Opening Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag
[FATAL] [1410114868.719106803]: Error opening file: Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag


Patrick@grimreaper:~$ rosbag info Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag
ERROR reading Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag: [Errno 2] No such file or directory: 'Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag'

But the file was successfully downloaded,

Patrick@grimreaper:~/ROSthings$ wget
--2014-09-07 23:23:24--
Resolving (, 2404:6800:4003:c01::52
Connecting to (||:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 81363927 (78M) [application/octet-stream]
Saving to: ‘Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag’

100%[=========================================================================================================>] 8,13,63,927 72.2KB/s   in 12m 24s

2014-09-07 23:35:49 (107 KB/s) - ‘Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag’ saved [81363927/81363927]

Any thoughts as to why this is happening?

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what about result of rosbag info Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag

bvbdort gravatar image bvbdort  ( 2014-09-07 14:38:38 -0500 )edit

@bvbdort edited.

lffox gravatar image lffox  ( 2014-09-07 15:08:31 -0500 )edit

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answered 2014-09-07 15:26:26 -0500

ahendrix gravatar image

It looks like you downloaded the bag file to your ROS directory ( ~/ROSthings ) but you're trying to run the playback tool from a different directory.

Does it work if you cd into your ROS directory before running rosbag?

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Hey, the .bag file opened but there wasn't any real time map generation in RVIZ. My impression was based on the point cloud data, RVIZ will generate a map, but nothing happened. Am I missing something?

lffox gravatar image lffox  ( 2014-09-07 16:01:54 -0500 )edit

Did you check map added in rviz panel and map topic is selected?

bvbdort gravatar image bvbdort  ( 2014-09-08 02:20:42 -0500 )edit

Ah. yes. It worked. I wish they told that in the wiki, that desired topics, pointcloud,map or path etc should be selected from the panel.

lffox gravatar image lffox  ( 2014-09-10 00:57:48 -0500 )edit

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Asked: 2014-09-07 13:48:34 -0500

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Last updated: Sep 07 '14