When I try to use any version of the Entity functions, the function is returned as if it were undefined. For example, EntityList["Planet"] returns EntityList[Planet]. The help examples don't work either. Is this happening to everyone, or just me?

  • $\begingroup$ On my machine, it works fine (Mathematica 10.0.1) $\endgroup$ – Mahdi Jun 5 '15 at 17:51
  • $\begingroup$ I think there is nothing broken in the Entity functions. It's most likely a problem with files in your paclets folder. $\endgroup$ – m_goldberg Jun 5 '15 at 19:04

Maybe try:

  • $\begingroup$ That did it! I hope that I didn't cause problems by deleting the Paclets folders. $\endgroup$ – George Wolfe Jun 5 '15 at 20:35
  • $\begingroup$ It works, but how to make it default? $\endgroup$ – vito Feb 27 '16 at 10:51

I'm running V10.1 on OS X 10.10.2 (Yosemite). I ran into this problem about two weeks ago. I solved it by shutting down Mathematica, throwing the Paclets folder found in ~/Library/Mathematica/ into the Trash, and restarting Mathematica. After restarting, I tried the same "Planet" example as you did and it worked (after downloading some new paclets).

I have not had any trouble with Entity expressions since.

  • $\begingroup$ Thanks for the suggestion. I deleted the Paclets folders in the ProgramData and AppData>Roaming folders, but it didn't fix the problem. I also did a "clean restart" of Mathematica, but that didn't help either. $\endgroup$ – George Wolfe Jun 5 '15 at 18:41
  • $\begingroup$ @GeorgeWolfe. Sorry it didn't work for you. Are you sure the packet folder you deleted is the only one on your system? I don't recognize the path you mentioned. I guess you aren't on OS X. $\endgroup$ – m_goldberg Jun 5 '15 at 19:01

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