When running nxserver commands like 'nxserver --restart' or 'nxserver --version', the following awk warning is printed:

/etc/NX/nxnode --version
nawk: cmd. line:1: warning: regexp escape sequence `"' is not a known regexp operator
NoMachine Cloud Server Evaluation Node - Version 6.10.4

A similar problem has been noticed also on Slackware, where the /usr/NX/var/log/nxerror.log file reports:

Info: Handling connection from 193.240.XXX.XXX port 18582 on Fri Jul 31 09:08:20 2020.
awk: cmd. line:1: warning: regexp escape sequence `\"' is not a known regexp operator
Info: Connection from 193.240.XXX.XXX port 18582 closed on Fri Jul 31 09:08:31 2020.
Info: Handler with pid 18812 terminated on Fri Jul 31 09:08:31 2020.