message: Not sure why necessary
diff: @@ -123,16 +123,16 @@ StepStatus SstReader::BeginStep(StepMode Mode, const float timeout_sec)
  SstStepMode StepMode;
  switch (Mode)
  {
  - case StepMode::Append:
  - case StepMode::Update:
  + case adios2::StepMode::Append:
  + case adios2::StepMode::Update:
  throw std::invalid_argument(
  "ERROR: SstReader::BeginStep inappropriate StepMode specified" +
  m_EndMessage);
  break;
  - case StepMode::NextAvailable:
  + case adios2::StepMode::NextAvailable:
  StepMode = SstNextAvailable;
  break;
  - case StepMode::LatestAvailable:
  + case adios2::StepMode::LatestAvailable:
  StepMode = SstLatestAvailable;
  break;
  }
  