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I have a function in a PowerShell module which creates a log file and starts a transcript using that file (see below). When running a PowerShell script, this works great and captures all output.

When running a PowerShell script which calls a batch file (which we do quite often while migrating from CMD > PowerShell), the batch file output shows on the console in the same window as the PowerShell script, but the transcript log file shows only 1 blank line where the call to the batch file is.

09:53:25 AM [Success] Zip file already up to date, no need to download!
09:53:25 AM [Note   ] Calling 1.bat

10:07:55 AM [Note   ] Calling 2.bat

I'm calling the batch files from .ps1 scripts with only the ampersand '&'.

What's strange is that sometimes the batch file output is captured in the log (usually the first batch file called). However I can't find anything special about these files.

What's also strange is that sometimes we call external programs (WinSCP) and the output from those commands only sometimes show in the transcript. Possibly relevant.

For reference, here is the function I use to create a transcript of our processes.

Function Log_Begin()
{
    <#
    .SYNOPSIS
    Starts the process for logging a PowerShell script.
    .DESCRIPTION
    Starts the process for logging a PowerShell script. This means that whenever
    this function is called from a PowerShell script, a folder called 'Logs' will
    be created in the same folder, containing a full transcript of the script's output.
    .EXAMPLE
    C:\PS> Log_Begin
    #>
    Process
    {
        $ScriptLoc = $MyInvocation.PSCommandPath
        $WorkDir = Split-Path $ScriptLoc
        If (!(Test-Path "$WorkDir\Logs")) {mkdir "$WorkDir\Logs" | Out-Null}
        $LogPath = "$WorkDir\Logs"
        $ScriptName = [io.path]::GetFileNameWithoutExtension($ScriptLoc)
        $LogDate = Get-Date -format "yyyy-MM-dd"
        $LogName = "$ScriptName $LogDate.log"
        $global:Log = $LogPath + "\" + $LogName
        $ErrorActionPreference="SilentlyContinue"
        Stop-Transcript | out-null
        $ErrorActionPreference = "Continue"
        # Create file and start logging
        If (!(Test-Path $Log)) {
            New-Item -Path $Log -ItemType File | Out-Null
        }
        Start-Transcript -Path $Log -Append
    }
}

Does anyone have any ideas on how I can capture the batch file output? Preferably I wouldn't have to change every call to a batch file from the script, and make something in the module.

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