roslaunch perception_palm perception_palm.launch FAILED

A customer reported:

Launching the perception_palm nodes previously failed (roslaunch perception_palm perception_palm.launch ) due to an error related to the camera. The error was "couldn't see format". We solved that by performing monocular calibrations of the cameras. We performed calibration of the IR range finder, yet we got the following error (unable to open file ir_calibration.txt (Ir calibration.png)).