ZUGFeRD: Send original message as attachment in error case

Modules.Interfaces/ZUGFeRDInterface.vb

@@ -60,6 +60,9 @@ Public Class ZUGFeRDInterface
             oProcessOutput = oProcess.StandardOutput.ReadToEnd()
             oProcessError = oProcess.StandardError.ReadToEnd()
             oProcess.WaitForExit()
+
+            _logger.Debug("Process Output:")
+            _logger.Debug(oProcessOutput)
         Catch ex As Exception
             _logger.Error(ex)
             Throw ex