Maybe Start-Transcript
would work for you. First stop it if it’s already running, then start it, and stop it when done.
$ErrorActionPreference="SilentlyContinue" Stop-Transcript | out-null $ErrorActionPreference = "Continue" Start-Transcript -path C:\output.txt -append # Do some stuff Stop-Transcript
You can also have this running while working on stuff and have it saving your command line sessions for later reference.
If you want to completely suppress the error when attempting to stop a transcript that is not transcribing, you could do this:
$ErrorActionPreference="SilentlyContinue"
Stop-Transcript | out-null
$ErrorActionPreference = "Continue" # or "Stop"