Hi Felix, When I use CTY to analyzer it, my command is like, python2 analyzing.py bonds5-1200.reaxc.reac -main bonds5-1200 -p CCCCCCCC/C=C/CCC[CH]CC[O]:C=O,CCCCCCCCC=CCCCC=C error: Traceback (most recent call last): File "analyzing.py", line 1030, in <module> if plot: anly.drawProfile(Plot=plot, Timestep=timestep) File "analyzing.py", line 484, in drawProfile ax.append(plt.subplot2grid((nsub,msub),(i%nsub,i//nsub),colspan=1,rowspan=1)) File "/home/zxs/.local/lib/python2.7/site-packages/matplotlib/pyplot.py",...