Not able to convert from PScustomobject to Arraylist - powershell

Question

I am trying to get all the list of patches from multiple servers. I am using invoke command with -asjob parameter to get the patch list from all servers. Running the below code.
I am getting the below error. I have tried with
Get-CIMInstance -Class Win32_QuickFixEngineering
and with
Get-WmiObject -Class Win32_QuickFixEngineering
but keep getting same error.
$Servers = Get-Content "C:\Users\Suman.Ghosh\Servers.txt"
[System.Collections.ArrayList]$All_Jobs = #()
[System.Collections.ArrayList]$Updated_Servers_List = #()
[System.Collections.ArrayList]$Jobs_Output = #()
$Patches_to_lookfor = #(
'KB4462926',
'KB4462941'
)
foreach ($S in $Servers) {
if (Test-Connection -ComputerName $S -Count 1 -Quiet) {
$Updated_Servers_List += $S
$All_Jobs += Invoke-Command -ComputerName $S -ScriptBlock {Get-HotFix} -AsJob
} else {
Write-Warning "Computer $S is not running"
}
}
Write-Host "below Jobs are running" -ForegroundColor Cyan
$All_Jobs
Write-Host "waiting for jobs to finish" -ForegroundColor Cyan
$All_Jobs | Wait-Job
$temp = #()
$flag = $false
foreach ($job in $All_Jobs) {
$Jobs_Output += Get-Job $job.Id | Receive-Job | Select HotFixID, CSNAME
}
foreach ($Job_output in $Jobs_Output) {
Write-Host $Job_output -ForegroundColor Green
### DO some stuff
}
Cannot convert value "#{HotFixID=KB4020449; CSName=mit1epxa2}" to type
"System.Collections.ArrayList".
Error: "Cannot convert the "#{HotFixID=KB4020449; CSName=mit1epxa2}" value
of type "Selected.System.Management.Automation.PSCustomObject" to type
"System.Collections.ArrayList"."
At line:1 char:10
+ foreach ($Job_output in $Jobs_Output) {
+ ~~~~~~~~~~~
+ CategoryInfo : MetadataError: (:) [], ArgumentTransformationMetadataException
+ FullyQualifiedErrorId : RuntimeException

Answer 1

Ok, let's see if my second answer gets deleted (with no notification) by people who don't know the topic. I believe you have run a command like this on $job_output (no "s"):
[collections.arraylist]$job_output = #()
Then in the loop at the bottom, an exception is created because a pscustomobject can't be cast to a collections.arraylist with the $job_output variable. $jobs_output (with the "s") is an arraylist of [pscustomobjects]'s created by select.
foreach ($Job_output in $Jobs_Output) {
Write-Host $Job_output -ForegroundColor Green
### DO some stuff
}