[Nevis-linux] Latest version of ROOT on notebook server

William Seligman seligman at nevis.columbia.edu
Mon Nov 30 22:25:43 EST 2020

To the users of the Jupyter server on notebook.nevis.columbia.edu:

I've upgraded the version of ROOT used by the server to the latest version, ROOT 6.22.02. This version is the most recent stable release from the ROOT team:


Unfortunately, this version introduces a flaw: JSROOT no longer works in Jupyter notebooks. This problem is supposed to be fixed in the next version of ROOT, which should be out in a month or so.


If you use PyROOT and include the statement

    import ROOT

You will see an error message:

    An exception occurred while loading libCore.so with ctypes

Unless you are calling C++ code from within Python, this error will not affect you.
William Seligman          |
Nevis Labs, Columbia Univ | nevis.columbia.edu/~seligman
PO Box 137                |
Irvington NY 10533  USA   | Phone: (914) 591-2823

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