$MyInvocation is not supported

[ForNeVeR]

User has reported in our maillist that $MyInvocation throws NotImplementedException.

I've tried to reproduce but just getting empty output instead. Here's my example script I'm testing:

echo 1 # To check if output works at all
echo $MyInvocation.MyCommand.Path # Should write current script name
echo $PSScriptRoot # Should write script directory