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Sounds like you redefined $ROS_PACKAGE_PATH so it no longer includes the stacks of the ROS distribution. That could explain your import failure.

Sounds like you redefined $ROS_PACKAGE_PATH so it no longer includes the stacks of the ROS distribution. That could explain your import failure.

The root problem seems to be misunderstanding environment variables, so here is the corrected export command, as explained in several comments below:

export ROS_PACKAGE_PATH=/home/maneesh/ros_stacks:$ROS_PACKAGE_PATH

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