CODEWITHSUNDEEP
powershellpowershell-2.0
b3bel
b3bel

Reputation: 415

PowerShell v2: Process with an Id of is not running

I'm trying to call a perl script using powershell as follows:

$plScript = Join-path $pwd 'Tools\myScript.pl'
$plOut = New-Item out.txt -type file -force
$plArgs = @($plScript, '--files','*.c', 'AddInc=\Tools','Addlib=\Tools')
Start-Process perl.exe -ArgumentList $plArgs -RedirectStandardOutput $plOut - wait

This fails with the following message:

Start-Process : Process with an Id of 80096 is not running.
+     Start-Process <<<<  perl.exe -ArgumentList  $plArgs  -RedirectStandardOutput $plOut -wait
+ CategoryInfo          : NotSpecified: (:) [Start-Process], ArgumentException
+ FullyQualifiedErrorId : System.ArgumentException,Microsoft.PowerShell.Commands.StartProcessCommand

Using Trace-Command, I see where it fails, but can't understand what's wrong

DEBUG: ParameterBinding Information: 0 : CALLING BeginProcessing
DEBUG: ParameterBinding Information: 0 : System.ArgumentException: Process with an Id of 150588 is not running.
at System.Diagnostics.Process.GetProcessById(Int32 processId, String machineName)
at Microsoft.PowerShell.Commands.StartProcessCommand.start(ProcessStartInfo startInfo)
at Microsoft.PowerShell.Commands.StartProcessCommand.BeginProcessing()
at System.Management.Automation.Cmdlet.DoBeginProcessing()
at System.Management.Automation.CommandProcessorBase.DoBegin()

What am I missing ?

Running this in powershell v3 succeeds with no errors... but I must support v2 for this assignment...

Upvotes: 1

Views: 2539

Answers (1)

Keith Hill
Keith Hill

Reputation: 202072

Seems like the perl process is exiting before the command can get the process's id. Try it this way to see if you can get past this - perhaps figure out why perl is exiting early:

$p = Start-Process perl.exe -ArgumentList $plArgs -RedirectStandardOutput $plOut -PassThru
if (!$p.HasExited) {
    $p.WaitForExit()
} 
else {
    "Hmm why did the process exit so early, exit code was: $($p.ExitCode)"   
}

Upvotes: 2

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