This revealed that PSEXEC adds some text to the end of the STDERR line containing CLIXML data which trips up powershell when parsing out CLIXML XML strings. Here is what PSEXEC writes to STDERR: ...

Trying to parse event XML with PowerShell Barmaglot Dec 7, 2014 Jump to latest Follow Reply ...

PowerShell How-To How To Validate XML Documents Using PowerShell and XSD The tiniest mistake could throw your whole list off. By Adam Bertram 11/11/2015 ...

This exhaustive Windows PowerShell tutorial is perfect for beginners who want to learn how to script in a quick and easy manner. Take a look!