Whenever I try to query information about a file in Powershell, it gives me nothing.  When I run a command like

inkscape --query-all file.svg

or

inkscape --actions="query-x" file.svg

It gives me nothing.  Just goes straight to the new line.  Whenever I run the same command in a batch file, it works just fine.

If I run a command to edit/output a new file in powershell like

inkscape --actions="select:$id;transform-rotate:$ang;export-filename:$fname;export-do;" $file.svg

works just fine.
 

I also tried commands like --actions-list and --verb-list and can't get anything either in powershell.

Can anyone help with why I'm unable to query information?

I also have
set-alias inkscape "C:\Program Files\Inkscape\bin\inkscape.exe"

at the beginning of all my powershell scripts to call inkscape that way

EDIT: I figured it out.

Whenever I do
set-alias inkscape "C:\Program Files\Inkscape\bin\inkscape.com"

instead of .exe, it lets me bring up information.  Querying, --action-list, --verb-list, etc all bring up information now.  Won't let me do actions that edit my files, so I guess I just gotta set aliases for both.  

I hardly ever use powershell

I sounds like an issue with the powershell stdout settings.

https://powershell.one/code/9.html

There is a command about halfway down - Get-Variable -Name *preference

Might give a clue if a stream has been set to 'SilentlyContinue' or something simliar

My powershell version 5.1.19041.1151 on Windows 10 by default works correctly.

It's output from the command above is:

Name                           Value
----                           -----
ConfirmPreference              High
DebugPreference                SilentlyContinue
ErrorActionPreference          Continue
InformationPreference          SilentlyContinue
ProgressPreference             Continue
VerbosePreference              SilentlyContinue
WarningPreference              Continue
WhatIfPreference               False

This Microsoft page https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_output_streams?view=powershell-7.1

Gives more info on streams, but beyond that - I honestly don't know