Hello,
Firstly please try this:
1)Shut down nxserver:
/etc/NX/nxserver --shutdown
2)Clean nxerror.log:
> /Library/Application\ Support/NoMachine/var/log/nxerror.log
3)Start up nxserver:
/etc/NX/nxserver --startup
If nxerror.log still continues to grow, please collect logs and send it to us to investigate and provide proper fix. This article shows how to collect logs: https://www.nomachine.com/DT10O00163
As a workaround you could redirect all logs written in nxerror.log to null, to do that you need to:
1)Shut down nxserver:
/etc/NX/nxserver --shutdown
2)Remove nxerror.log:
rm -rf /Library/Application\ Support/NoMachine/var/log/nxerror.log
3)Redirect nxerror.log to /dev/null:
cp -a /dev/null /Library/Application\ Support/NoMachine/var/log/nxerror.log
4)Start up nxserver:
/etc/NX/nxserver --startup