<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi all,<div class=""><br class=""></div><div class="">I’m attempting to adapt the example script for plotting star formation rates (found at <a href="http://yt-project.org/doc/analyzing/analysis_modules/star_analysis.html#star-formation-rate" class="">http://yt-project.org/doc/analyzing/analysis_modules/star_analysis.html#star-formation-rate</a>) to work with output data from a simulation run using Enzo. However, when I attempt to run the script, I get the following error:</div><div class=""><br class=""></div><div class="">———————————————————</div><div class=""><br class=""></div><div class="">File "PlotSFR.py", line 26, in <module><br class=""> sfr = StarFormationRate(data, star_mass=mass_old, star_creation_time=ct_old, volume=sp.volume())<br class=""> File "/usr/local/anaconda/lib/python2.7/site-packages/yt/analysis_modules/star_analysis/sfr_spectrum.py", line 115, in __init__<br class=""> self._ds.quan(1.0, 'Mpccm**3').units<br class=""> File "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/yt_array.py", line 1355, in __new__<br class=""> dtype=dtype, bypass_validation=bypass_validation)<br class=""> File "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/yt_array.py", line 430, in __new__<br class=""> units = Unit(input_units, registry=registry)<br class=""> File "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/unit_object.py", line 257, in __new__<br class=""> unit_data = _get_unit_data_from_expr(unit_expr, registry.lut)<br class=""> File "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/unit_object.py", line 572, in _get_unit_data_from_expr<br class=""> unit_data = _get_unit_data_from_expr(unit_expr.args[0], unit_symbol_lut)<br class=""> File "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/unit_object.py", line 566, in _get_unit_data_from_expr<br class=""> return _lookup_unit_symbol(str(unit_expr), unit_symbol_lut)<br class=""> File "/usr/local/anaconda/lib/python2.7/site-packages/yt/units/unit_object.py", line 657, in _lookup_unit_symbol<br class=""> "symbols." % symbol_str)<br class="">yt.units.unit_registry.UnitParseError: Could not find unit symbol 'Mpccm' in the provided symbols.</div><div class=""><br class=""></div><div class="">———————————————————</div><div class=""><br class=""></div><div class="">I am using version 3.3.5 of yt.</div><div class=""><br class=""></div><div class="">Does anyone know how I can resolve this? Any suggestions would be greatly appreciated.</div><div class=""><br class=""></div><div class="">Thanks,</div><div class="">Ashley</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div></body></html>