Need to run app on N remotes hosts and handle them all

Question

Im using this code to run app on N remote hosts and need to wait until all of them are finished and get their results. But the execution just passes throuhg, all jobs are being marked Completed and code exits. How to make it wait till apps finished their execution?

$procArray = [System.Collections.ArrayList]@()

foreach ($key in $simulatorServers.keys) {

    $unitHost = $simulatorServers[$key][0]
    $EXE="C:\app.exe"
    Wr-DebugReg "Running $EXE on $unitHost "
    $ScriptString="Start-Process -FilePath $EXE "
    $ScriptBlock=[System.Management.Automation.ScriptBlock]::Create($ScriptString)
    $Session=New-PSSession -ComputerName $unitHost -EnableNetworkAccess -Name "session$counter" -Credential $crNonProd
    $rez2 = Invoke-Command -Session $Session -ScriptBlock $ScriptBlock -AsJob
    $rez00=$procArray.Add($rez2)
    Wr-DebugReg "Running process id=$($rez2.id) name=$($proc.Name)on $unitHost"
    Wr-DebugReg ""
}
$procArray | Wait-Job
$procArray | Receive-Job

these jobs gone to status Completed even if launched processes still running

Answer 1

This code is working. -Wait is the key to make it wait until all jobs are finished.

$procArray = [System.Collections.ArrayList]@()

foreach ($key in $hosts.keys) {
    $unitHost = $hosts[$key][0]
    $EXE="c:\app.exe"

    $Session=New-PSSession -ComputerName $unitHost -EnableNetworkAccess -Name "session$counter" -Credential $crNonProd
    $rez2 = Invoke-Command -Session $Session -ScriptBlock {Start-Process -FilePath $args[0] -Wait} -ArgumentList  $EXE -AsJob
    $rez00=$procArray.Add($rez2)
    Wr-DebugReg "Starting process id=$($rez2.id) name=$($proc.Name)on $unitHost"
    Wr-DebugReg ""
}

while ($procArray.State -contains 'Running')
{
    Start-Sleep -Seconds 1
}