You might have wondered what happens with output produced by Tcl procedures (for example, with the puts command) when you use Tcl in Embedded Event Manager (EEM) or Embedded Syslog Manager (ESM). If the Tcl procedure executes in context of a line (console or virtual terminal), the output is sent straight to the attached line, otherwise it's processed by the logging manager (resulting in a syslog message).

There are two scenarios where Tcl would execute in context of a line: if you start a Tcl procedure with the tclsh command or if it's an EEM policy registered with the event_register_cli with sync parameter set to yes.