put setParticlePath at a better location

1 files changed, 2 insertions, 3 deletions

diff --git a/Source/Diagnostics/WarpXOpenPMD.cpp b/Source/Diagnostics/WarpXOpenPMD.cpp
index a929554e0..dcdd69652 100644
--- a/Source/Diagnostics/WarpXOpenPMD.cpp
+++ b/Source/Diagnostics/WarpXOpenPMD.cpp
@@ -76,6 +76,8 @@ WarpXOpenPMDPlot::Init(openPMD::AccessType accessType)
   else
     m_Series = new openPMD::Series(filename, accessType);
 
+  // actually default is "particles"  by openPMD.
+  m_Series->setParticlesPath("particles");
 }
 
 
@@ -154,9 +156,6 @@ WarpXOpenPMDPlot::SavePlotFile (const std::unique_ptr<WarpXParticleContainer>& p
   if ( nullptr == m_Series)
     return;
 
-  if (0 == m_CurrentStep ) // can only define once
-    m_Series->setParticlesPath("particles");
-
   WarpXParticleCounter counter(pc);
 
   openPMD::Iteration currIteration = m_Series->iterations[iteration];