2670820 - Configtool does not display when executing configtool.sh in Unix systems

When running configtool.sh from the Config Tool directory, the tool does not open or is not displayed correctly. No explicit error appears in the terminal, but the configtool trace/log contains errors such as:

• com.sap.ASJ.cft.000229#BC-JAS-ADM-ADM-CFT#sap.com~tc~je~configtool#C0000A0F0146000000000000146044D7###configtool########Thread[main,5,main]#Plain##
  Config tool stoped due to fatal error. See trace file for more details.
  java.awt.HeadlessException: 
  No X11 DISPLAY variable was set, but this program performed an operation which requires it.

Or:

• com.sap.ASJ.cft.000229#BC-JAS-ADM-ADM-CFT#sap.com~tc~je~configtool#C000C0A801AA0000000000016CF0E0BA###configtool########Thread[main,5,main]#Plain##
  Config tool stoped due to fatal error. See trace file for more details.
  java.lang.InternalError: Can't connect to X11 window server using ':15.0' as the value of the DISPLAY variable; you may consider checking your DISPLAY environment variable.

Note: (DISPLAY value may vary, e.g. :15.0, localhost:10.0, etc.)

• SAP NetWeaver – Java AS
• Unix/Linux OS

Configtool blank screen, Configtool does not display,  Can't connect to X11 window server using, no X11 display variable was set, SSH , KBA , BC-OP-LNX , Linux , BC-OP-AS4 , IBM AS/400 , BC-OP-HPX , HP-UX , BC-OP-AIX , IBM AIX , BC-OP-SUN , SUN Solaris , BC-JAS-ADM-ADM , Administration , Problem