The following error message when a smb unmount fails.

MarcoPolo Error

4/14/11 5:32:16 PM	MarcoPolo[20081]	AppleScript failed to execute! Script was:
tell application "Finder"
  activate
  eject "smb://dept.office.company.tld/ShareName$"
end tell

Error dictionary: {
    NSAppleScriptErrorAppName = Finder;
    NSAppleScriptErrorBriefMessage = "Can\U2019t make \"smb://dept.office.company.tld/ShareName$\" into type item.";
    NSAppleScriptErrorMessage = "Finder got an error: Can\U2019t make \"smb://dept.office.company.tld/ShareName$\" into type item.";
    NSAppleScriptErrorNumber = "-1700";
    NSAppleScriptErrorRange = "NSRange: {39, 52}";
}