TMSSSTDERRTERMINAL

The Environmental Variable TMSSSTDERRTERMINAL displays the stderr on terminal, while still allowing it to be written to the file specified by TMSSSTDERRDIR.

Variable TMSSSTDERRDIR set to a valid file location.

set TMSSSTDERRTERMINAL=true

$env:TMSSSTDERRTERMINAL = true

export TMSSSTDERRTERMINAL=true