<div dir="ltr">In your script you have<div><br></div><div>    my_sphere = (c, (150.0, "kpc"))</div><div><br></div><div>You should have:</div><div><br></div><div>    my_sphere = ds.sphere(c, (150.0, 'kpc'))</div><div><br></div><div>HTH!</div><div><br></div><div>-Nathan</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Nov 24, 2015 at 7:26 PM, Fitzgerald, Madison Lyn <span dir="ltr"><<a href="mailto:fitzg152@msu.edu" target="_blank">fitzg152@msu.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">



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Hi,
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<div>I’m using yt 3.2.2 through miniconda on a Mac. I’m just trying to make a simple phase plot (<a href="http://paste.yt-project.org/show/6076/" target="_blank">http://paste.yt-project.org/show/6076/</a>), but I’m getting an error that I don’t understand
 and can’t seem to fix (<a href="http://paste.yt-project.org/show/6077/" target="_blank">http://paste.yt-project.org/show/6077/</a>). I haven’t made a phase plot in a while, but the error started earlier today when I was trying to make a more complex phase plot. So
 I thought it must have been something I had done, but even going back to this simple phase plot, I’m still seeing the error "AttributeError: 'tuple' object has no attribute ‘_determine_fields’".</div>
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<div>Any help would be deeply appreciated.</div>
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<div>Thank you,</div>
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<div>Madison Fitzgerald</div>
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<div>Astrophysics | Lyman Briggs College</div>
<div>Women’s & Gender Studies | College of Arts & Letters</div>
<div>LGBTQ and Sexuality Studies Specialization</div>
<div>
<div>Women in Science, President</div>
<div>Undergraduate Teaching Assistant</div>
<div>Department of Physics and Astronomy</div>
</div>
<div>Honors College</div>
<div>Michigan State University</div>
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