Screen Lock in Rev?

[Roger.E.Eller at sealedair.com]

http://docs.runrev.com/Function/shell

FROM THE DOCS:
"Tip: If you are having problems with the shellfunction, try executing the
commandLine at your operating system's shell prompt. (For example, on an OS
X system, try executing the commandLine in the Terminal window.) If a
commandLine does not work at the shell prompt, it won't work with the
shellfunction either, so trying this can be useful when debugging."

http://docs.runrev.com/Keyword/without