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Not exactly sure why you are getting the segfault. I don't experience this problem on Fuerte. One potential workaround would be to instead use rostopic to produce your csv file.

rostopic echo -p -b BAG_NAME TOPIC_NAMES > output.csv

will produce a nicely formatted csv file. I prefer this technique over rxbag because it is easier to automate. More can be read here.

Not exactly sure why you are getting the segfault. I don't experience this problem on Fuerte. One potential workaround would be to instead use rostopic to produce your csv file.

rostopic echo -p -b BAG_NAME TOPIC_NAMES > output.csv

will produce a nicely formatted csv file. I prefer this technique over rxbag rxbag because it is easier to automate. More can be read here.