4
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Manipulate[Plot[Erfc[x/(2 Sqrt[t])], {x, -5, 5}], {t, 0.1, 5}]

With a fresh kernel, after evaluating this, Mathematica will hang immediately if I try to drag the slide bar.

After some testing, this problem exists on 10.1 and later on my machine. Is it a bug?

My test environment: OS X 10.11.4, version 10.0.2 does not have this problem; version 10.1, 10.2, 10.3, 10.3.1, 10.4, 10.4.1 have this problem;

on Windows 10(10240), 10.1 and 10.2 do not have this problem; 10.3 and 10.4 have this problem;

on Windows XP, version 6,7,8,9 do not have this problem.(Manipulate does not exist below version 6)

More observations:

For the versions with problems, consecutively evaluating the expression twice will fix it.

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2
  • $\begingroup$ No problems on my Mathematica 10.0.2.0 Windows 64 bits $\endgroup$
    – andre314
    May 8 '16 at 15:58
  • $\begingroup$ No problem with version 10.3.1 on OS X 10.11.4. $\endgroup$ May 8 '16 at 16:00
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Disable "Show Suggestions Bar after last output" and be sure "Dynamic Updating Enabled". Now you can run the Manipulate and it works fine on Windows 10 (64 bit) and Mathematica 10.4.1.

Manipulate[Plot[Erfc[x/(2 Sqrt[t])], {x, -5, 5}], {t, 0.1, 5}]

enter image description here

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2
  • 2
    $\begingroup$ Another suggestion bar bug $\endgroup$
    – vapor
    May 9 '16 at 4:14
  • 1
    $\begingroup$ @happy fish You're right, it's not the only one :) $\endgroup$
    – user36273
    May 9 '16 at 8:34

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