RUNRMTCMD isn’t Client Access specific. Client Access simply provides a convenient rexec() client. You can download/install other clients if you wish. You can also use the rexec() API or the Qshell rexec, ‘Run remote command’, utility without any need for Client Access at all.
Whatever you use, you’ll need to install something compatible on the PC. There wouldn’t e a single PC on your office network if some other system could simply send a command to it and the command would run.
Tom, I started looking at QShell but am not that familiar with it. I will try the RUN command in qshell as you suggested.