Find-Error.ps1

cd ''

dir -File -Recurse | where Extension -eq .log | foreach {
    Write-Progress $_.BaseName
    $flag = $false
    cat $_ | foreach {
        $line = $_ | sls 'ERROR' -CaseSensitive
        if ($line.count) {
            Write-Host
            $line.Line
            $flag = $true
        }
        elseif ($flag) {
            if ($_.Trim() -like 'at*') {
                $_
            }
            elseif ($_.Trim() -notlike 'at*') {
                $flag = $false
            }
        }
    }
}

Write-Progress -Completed