Hi yt user, This question mostly goes to John Wise (maybe not). I try to use eps_writer module in the yt to generate a high-quality .eps figure. I attempt to make four phase plot (rho-T) from four different times (i.e. four different data output) But, I got the following error message: File "Phase_eps.py", line 39, in <module> ep = eps.multiplot_yt(2,2,pc) File "/home/jhchoi/common/lib/python2.7/site-packages/yt-2.4-py2.7-linux-x86_64.egg/yt/visualization/eps_writer.py", line 1010, in multiplot_yt "x ncol(%d)." % (len(plot_col.plots), nrow, ncol) TypeError: not all arguments converted during string formatting It look that there is a problem when I over write PlotCollection object for four different data output (or maybe not). How can I solve the issue? I paste my script at http://paste.yt-project.org/show/3112/ . In addition, I would like to get more information/document about eps_writer. For example, I would like to write the time of four phase respectively. Where can I get the information about it? Thank you in advance, Junhwan -- -------------------------------------------------------------- Jun-Hwan Choi, Ph.D. Department of Physics and Astronomy, University of Kentucky Tel: (859) 897-6737 Fax: (859) 323-2846 Email: jhchoi@pa.uky.edu URL: http://www.pa.uky.edu/~jhchoi --------------------------------------------------------------