# PTAM CameraCalibrator error

I am trying to run the cameracalibrator.launch using PTAM according to this Camera Calibration tutorial. However, when I do so, I get the following error:

ERROR: cannot launch node of type [ptam/cameracalibrator]: can't locate node [cameracalibrator] in package [ptam]


I source my devel/setup.bash before I run the code as well and it still does not work. Here is my launch file:

<launch>
<node name="cameracalibrator" pkg="ptam" type="cameracalibrator" clear_params="true" output="screen">
<remap from="image_raw" to usb_cam/image_raw" />
<remap from="pose" to="pose"/>
<rosparam file="\$(find ptam)/PtamFixParams.yaml"/>
</node>
</launch>


Here is what I get for rostopic list:

/rosout
/rosout_agg
/svo/dense_input
/svo/image
/svo/image/compressed
/svo/image/compressed/parameter_descriptions
...
/tf
/usb_cam/camera_info
/usb_cam/image_raw
/usb_cam/image_raw/compressed
...
/usb_cam/image_raw/theora
/usb_cam/image_raw/parameter_descriptions


The path where the cameracalibration.launch file is catkin_ws/src/ethzasl_ptam/ptam/launch.

I am not sure why this error keeps coming up because when I run roslaunch ptam cameracalibrator.launch, it says:

NODES
/
cameracalibrator (ptam/cameracalibrator)


So I'm thinking that PTAM does include cameracalibrator. If someone could please point out my error, that would be really helpful. I've been using this post as a guide, but it's not been helping me much: Ros Dynamic Config file.

As it says in the above link, I tried find . -executable and I could not find cameracalibrator. I could only find the below. How do I proceed?

./include
./include/ptam
./cfg
...
./launch
./src
./src/ptam
./src/ptam/cfg
...