Running 7-Zip from within a Powershell script
Found this script and adapted it to your needs. Can you please try:
$7zipPath = "$env:ProgramFiles\7-Zip\7z.exe"if (-not (Test-Path -Path $7zipPath -PathType Leaf)) { throw "7 zip file '$7zipPath' not found"}Set-Alias 7zip $7zipPath$Source = "c:\BackupFrom\backMeUp.txt"$Target = "c:\BackupFolder\backup.zip"7zip a -mx=9 $Target $Source
Simply prefix the command with an ampersand
& "C:\Program Files\7-Zip\7z.exe" -mx=9 a "c:\BackupFolder\backup.zip" "c:\BackupFrom\backMeUp.txt"