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I am running Mathematica 10 under Windows 7 (32 bit).

One of my old examples did not run any more under Mathematica 10. After some digging, I found the following buggish behaviour of Animator. Please start with a fresh kernel and then evaluate:

In[1]:=  Animator[x, {0, 1}]
Out[1]= Animator[x,{0,1}]

In[2]:= Animator[Dynamic[x], {0,1}]
(* works *)

In[3]:= Animator[x, {0,1}]
(* now works! *)

In[4]:= Animator[x, {0,Pi}]
(* Mma 10.0 not running, message: "The specified setting for the option FEFloatIterator cannot be used". *)

It seems that in Mathematica 10.0 the command Animator[x, {0, z}] only runs when z is an explicit real or integer, but not when z contains a numerical symbol such as Pi or E. In Mathematica 10.1 this seems to be repaired.

But in both versions, the command Animator[x, {0,1}] only runs when first Animator[Dynamic[x], {0,1}] is executed.

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  • $\begingroup$ I think there was such an error, I saw it on one or 2 of my demos. But now it is gone, at least I tried your code in 10.1 and it works with no problem on my windows 7. But the error message you show, I've seen before and even reported it. I had no idea why it came from. Code used to work ok before 10, and then on some demos I saw the above message. $\endgroup$
    – Nasser
    Apr 12, 2015 at 6:01
  • $\begingroup$ I've seen it too. Related: mathematica.stackexchange.com/questions/66542/… $\endgroup$
    – Michael E2
    Apr 12, 2015 at 13:57

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