Version-scriptblock-host-problem

Version and scriptblock host problem

When PowerShell.exe is called from PowerShell then it is possible to specify the parameter Command as a script block. But if the parameter Version is also specified then in some hosts this combination fails with a confusing error:

The term '-Version' is not recognized as the name of a cmdlet, function, script file, or operable program.

For example, this command works in any host

    PowerShell {...}

This command works in ConsoleHost but fails in ISE, DefaultHost, and some others including PowerShell jobs

    PowerShell -Version 2 {...}

Scripts

• Test.1.works.in.any.host.ps1 - PowerShell {...} works in any host.
• Test.2.works.in.ConsoleHost.ps1 - with Version it works in ConsoleHost but fails in others.
• Test.3.fails.in.DefaultHost.ps1 shows that PowerShell -Version 2 {...} fails in DefaultHost.
• Test.4.fails.in.PowerShell.job.ps1 shows that PowerShell -Version 2 {...} fails in a PowerShell job.

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v6-beta.7+ notes

-Version is not supposed to be used for invoking commands.

• PowerShell/issues/4834