Hi,

  I'm using DMTCP 2.4.9 (my machine is old and can't compile the latest DMTCP), 
and I have this error message:
$ dmtcp_launch vncserver :1
VNC(R) Server 6.4.0 (r39899) x64 (Dec 7 2018 12:25:37)
Copyright (C) 2002-2018 RealVNC Ltd.
RealVNC and VNC are trademarks of RealVNC Ltd and are protected by trademark
registrations and/or pending trademark applications in the European Union,
United States of America and other jurisdictions.
Protected by UK patent 2481870; US patent 8760366; EU patent 2652951.
See https://www.realvnc.com for information on VNC.
For third party acknowledgements see:
https://www.realvnc.com/docs/6/foss.html
OS: Red Hat Enterprise Linux Server 7.6, Linux 3.10.0, amd64

Xvnc-core does not exist or is not executable
Error: Error querying VNC settings.

$ which Xvnc-core
/usr/bin/Xvnc-core

vncserver :1 works fine by itself, but not using under dmtcp_launch.  Any ideas?
Thanks.

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