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After updating to TeXLive 2023 the command</div>
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pdftex mpsproof pic.mps</div>
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failed, because TL2023 apparently lacks the file supp-pdf.tex.</div>
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To repair this problem, the line</div>
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\input supp-pdf</div>
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in mpsproof.tex needs to be replaced with</div>
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\input supp-pdf.mkii</div>
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I am the creator of mpsproof, but I placed it in the public domain so anyone is free to make this change to their own copy.</div>
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Also, because supp-pdf.mkii is provided by context, and perhaps not every TeX system contains context, this file should probably be included in the metapost distribution alongside mpsproof.tex (or better, included with the graphics-def package because pdftex.def
also needs it). I am not a lawyer, but I believe the context license permits this.</div>
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Cheers,</div>
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Dan<br>
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<div style="font-family:Tahoma; font-size:13px"><font size="3" face="Courier New">Daniel H. Luecking [luecking@uark.edu]
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Department of Mathematical Sciences<br>
1 University of Arkansas<br>
Fayetteville, AR, USA 72701-1201</font><br>
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