StandardOut has not been redirected or the process hasn't started yet.

[theguyinthehat]

I run a program based on a timer in VB.NET, and it executes just fine when I don't try to retrieve the output. For some reason, though, I constantly get an error on the Dim myOutput line... Can anyone spot my error? output is a string.

Error: StandardOut has not been redirected or the process hasn't started yet.

Dim fetch As New System.Diagnostics.ProcessStartInfo("C:/perlprog.pl")
        fetch.WindowStyle = ProcessWindowStyle.Hidden
        Dim executable As System.Diagnostics.Process
        executable = System.Diagnostics.Process.Start(fetch)
        Dim myOutput As System.IO.StreamReader = executable.StandardOutput
        executable.WaitForExit(timer1.Interval)
        If executable.HasExited Then
            output = myOutput.ReadToEnd
        End If
        If Trim(output) = "" Then
            output = "No errors (really)."
        End If
        lblerr.Text = output

[kebo]

from msdn...

InvalidOperationException....
The StandardOutput stream has not been defined for redirection; ensure ProcessStartInfo..::.RedirectStandardOutput is set to true and ProcessStartInfo..::.UseShellExecute is set to false.

try adding these line of code before starting the process....

fetch.UseShellExecute = False
fetch.RedirectStandardOutput = True

hth
kevin

[theguyinthehat]

I did and it suddenly didn't like the executable = System... line

error: The specified executable is not a valid Win32 application.

I assume since its a perl program (which is native to unix, but is adapted to Win32) I'm guessing that's an issue for redirecting output. Or do I need to assign the output stream from within the perl program?