I don't really care for the way KiX RUN or SHELL work, especially with WKiX and KiXforms, so I prefer to use ShellExecute.
$oShell = CreateObject("Shell.Application")
$oFolder = $oShell.ShellExecute('CMD',' /c Start "TapeCopyCMD" tapecopy'+$TapeCopyParms,'C:\Program Files\CA\BrightStor ARCserve Backup',"",1)
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.