Aggrescan encountered an error and it wasn't one we were expecting. 
Please see the the following Traceback, perhaps it will be helpfull in understanding what happened.
We would be grateful if you reported the incident to one of the authors so we can correct the error.
Traceback (most recent call last):
  File "/home/users/lcbio/anaconda2/envs/exec/lib/python2.7/site-packages/aggrescan/__main__.py", line 37, in run_program
    a.run_job()
  File "/home/users/lcbio/anaconda2/envs/exec/lib/python2.7/site-packages/aggrescan/newRunJob.py", line 108, in run_job
    self.post_processing(work_dir=self.tmp_dir, final=True, model_name="folded")
  File "/home/users/lcbio/anaconda2/envs/exec/lib/python2.7/site-packages/aggrescan/newRunJob.py", line 116, in post_processing
    prepare_output(work_dir=work_dir, final=final, model_name=model_name)
  File "/home/users/lcbio/anaconda2/envs/exec/lib/python2.7/site-packages/aggrescan/postProcessing.py", line 235, in prepare_output
    make_plots(data=data, work_dir=work_dir)
  File "/home/users/lcbio/anaconda2/envs/exec/lib/python2.7/site-packages/aggrescan/postProcessing.py", line 105, in make_plots
    plt.axis(ymin=-4, ymax=4, xmin=min(x) - 2, xmax=max(x) + 2)
ValueError: min() arg is an empty sequence