Cannot open channel to X server

Last Published: April 25, 2020

Error Message

While rlogged into a different UNIX machine, attempting to open ArcView or a graphics window in ArcInfo with the command 'display 9999' returns the error message:

"Cannot open channel to X server. Warning, the display service is not defined. Resetting to dumb terminal mode."


The xhost command has not been issued before rlogging into the second machine and 'setenv DISPLAY <hostname of first machine>:0.0' has not been set while rlogged into the second machine.

Solution or Workaround

  1. While logged into the first machine, issue the command:
    xhost +

  2. rlogin to the second machine.
  3. Issue the command:
    setenv DISPLAY <hostname of first machine>:0.0

Article ID:000002638

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