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Error opening file written with rosbag?

asked 2014-01-13 17:15:29 -0600

randylewis7 gravatar image

Hello, I'm trying to follow the following tutorial so that I can incorporate reading and writing bag files into a program I'm creating:

h t t p : / / w i k i . r o s . o r g / r o s b a g / C o d e % 2 0 A P I # c p p _ a p i

However, there seems to be something going wrong with the writing to the file. When I comment out the file reading section (because this part is causing errors upon compilation), and simply try to open the bag file written in a text editor, I get an error message, saying that the file cannot be read properly or something like that. If I ignore the error, the resulting document looks really weird and has strange symbols and red coloration and just looks very wrong (I'm just trying to write a string and a number).

Anyone know what's going wrong/how to fix it? (I think the error in the reading section is being caused by incorrect writing of the file in the first place)

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What exactly are you doing? What is the exact error message that you get? What would you expect differently? Are you aware that rosbag files are a custom format?

dornhege gravatar imagedornhege ( 2014-01-13 22:46:03 -0600 )edit

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answered 2014-01-14 06:51:55 -0600

ahendrix gravatar image

Compilation errors are not runtime errors, and will never be caused by a corrupt bag file. If you're having trouble compiling, there's a problem with your code or with one of the libraries.

Bag files are a binary format; they will not be readable in a standard text editor. You can read them with the rosbag command line tool, or using the rqt_bag GUI tool.

If you can post samples of your code and the compilation errors you're seeing, you'll get more specific answers.

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Asked: 2014-01-13 17:15:29 -0600

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Last updated: Jan 14 '14