How to capture error output only in a variable in PowerShell

Question

I want to store the stderr output of a PowerShell command in a variable. I don\'t want to store it in a file and I don\'t want standard output included, just the error output.

Answer 1

You can call the command a slightly different way and use the -ErrorVariable parameter in PowerShell:

Invoke-Expression "$command $params" -ErrorVariable badoutput

$badoutput will now contain the contents of the error string.