Hi Rose. You report 2 different problems: (A) problems with the display, and (B) problems running ATK Python. Let's consider (B) first.
Please tell me
1) Which Linux distribution do you use? And is this on your laptop or on some computing cluster?
2) Which version of VNL-ATK do you use?
3) Do you know if the ATK calculation actually runs (i.e. the problem is just that the log file is empty), or does the calculation crash?
4) Please tell me the results from running attached script in the following 2 different ways:
atkpython Silver.py 2>&1 | tee serial.log
mpirun -np 2 atkpython Silver.py 2>&1 | tee parallel.log