[BLAM] catkin_make_isolated: command not found

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Hi, I've been struggling for days to setup BLAM!, Let me provide you with the maximum of information you might need :

my ROS_PACKAGE_PATH is set to /opt/ros/kinetic/share. I did remove the catkin_ws path.

I cloned the project to my home folder and tried the same with creating a folder in home and cloning the project into this folder. Same bug.

THE BUG:

When I type sudo ./update (Without the sudo I get a lot of permission denied errors, ergo, the sudo) I get the following errors (the error in pastebin)

Creating a ROS workspace for third party packages.
Merge caused no change, no new elements found
./update: line 13: catkin_make_isolated: command not found
Creating a ROS workspace for BLAM packages.
Merge caused no change, no new elements found
[blam_example] Updating /home/hamza/blam/internal/src/blam_example
[blam_example] Done.
[blam_slam] Updating /home/hamza/blam/internal/src/blam_slam
[blam_slam] Done.
[geometry_utils] Updating /home/hamza/blam/internal/src/geometry_utils
[geometry_utils] Done.
[laser_loop_closure] Updating /home/hamza/blam/internal/src/laser_loop_closure
[laser_loop_closure] Done.
[measurement_synchronizer] Updating /home/hamza/blam/internal/src/measurement_synchronizer
[measurement_synchronizer] Done.
[parameter_utils] Updating /home/hamza/blam/internal/src/parameter_utils
[parameter_utils] Done.
[point_cloud_filter] Updating /home/hamza/blam/internal/src/point_cloud_filter
[point_cloud_filter] Done.
[point_cloud_localization] Updating /home/hamza/blam/internal/src/point_cloud_localization
[point_cloud_localization] Done.
[point_cloud_mapper] Updating /home/hamza/blam/internal/src/point_cloud_mapper
[point_cloud_mapper] Done.
[point_cloud_odometry] Updating /home/hamza/blam/internal/src/point_cloud_odometry
[point_cloud_odometry] Done.
[point_cloud_visualizer] Updating /home/hamza/blam/internal/src/point_cloud_visualizer
[point_cloud_visualizer] Done.
[pose_graph_msgs] Updating /home/hamza/blam/internal/src/pose_graph_msgs
[pose_graph_msgs] Done.
./update: line 27: catkin_make: command not found
./update: line 28: /home/hamza/blam/internal/devel/setup.bash: No such file or directory

I'm not feeling optimistic about it at all, kind of tried every thread I've found. With no official documentation or tutorial, don't know how this is supposed to work...

Thanks !