Cannot open graph in ROOT at CERN lxplus

Dear experts,

Since 2 days ago I cannot open any graph interface in ROOT at CERN lxplus. When I try to draw something or do “TBrowser b”, it crashes and displays error messages without stopping, as pasted below. But I can still open other graphs, e.g. “display XXX.png” without problem. Any help will be greatly appreciated. Thank you in advance!

Best,
Jian

root [2] TBrowser b
(TBrowser &) Name: Browser Title: ROOT Object Browser
root [3] Error in : fatal X11 error (connection to server lost?!)

**** Save data and exit application ****

Warning in TGClient::GetColorByName: couldn’t retrieve color #000000.
Please close any other application, like netscape, that might exhaust
the colormap and start ROOT again
Warning in TGClient::GetColorByName: couldn’t retrieve color #000000.
Please close any other application, like netscape, that might exhaust
the colormap and start ROOT again
Warning in TGClient::GetColorByName: couldn’t retrieve color #000000.
Please close any other application, like netscape, that might exhaust
the colormap and start ROOT again
Warning in TGClient::GetColorByName: couldn’t retrieve color #000000.
Please close any other application, like netscape, that might exhaust
the colormap and start ROOT again
Warning in TGClient::GetColorByName: couldn’t retrieve color #000000.
Please close any other application, like netscape, that might exhaust
the colormap and start ROOT again

Hi,

what ROOT is this? How did you set it up? Please note that this may not be the right forum for the question as this looks like an issue in the CERN cluster.

Cheers,
D

Hi,

The problem has been solved.
CERN service desk forwarded me to this forum, but in the end it was not a ROOT issue.
Thank you all the same!

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