[gregg]

I think one way to accomplish this is to capture the current name, set new name, start log, reset name.

# $language = "Python"
# $interface = "1.0"

s = crt.Session
config = s.Config
orig_name = config.GetOption("Log Filename")
s.LogFileName = "my-new-file.log"
s.Log(False)
s.Log(True, True)
s.LogFileName = orig_name

# rest of script / terminal work

Changing the LogFileName after starting the log does not seem to affect the current log stream.

Note: had to use config.GetOption() to retain the raw "%S_%Y_%M%D" - because s.LogFileName returns the substituted name.