if the pressures are all 0, it means there is an error in loading the stress data.
The code should stop the execution and tell the user that there is an error in loading the pressure data.
Most likely, the error is that the user forget to store the pressures in the files pressures_populationX_Y.dat
if the pressures are all 0, it means there is an error in loading the stress data. The code should stop the execution and tell the user that there is an error in loading the pressure data. Most likely, the error is that the user forget to store the pressures in the files pressures_populationX_Y.dat