[mini] Add clean error message when user makes a typo in fields to output (#1409)

* Add clean error message when user makes a typo in fields to output

* Add a space

1 files changed, 3 insertions, 0 deletions

diff --git a/Source/Diagnostics/FullDiagnostics.cpp b/Source/Diagnostics/FullDiagnostics.cpp
index 62e8da74e..aa58ecd42 100644
--- a/Source/Diagnostics/FullDiagnostics.cpp
+++ b/Source/Diagnostics/FullDiagnostics.cpp
@@ -404,6 +404,9 @@ FullDiagnostics::InitializeFieldFunctors (int lev)
         } else if ( m_varnames[comp] == "divE" ){
             m_all_field_functors[lev][comp] = std::make_unique<DivEFunctor>(warpx.get_array_Efield_aux(lev), lev, m_crse_ratio);
         }
+        else {
+            amrex::Abort("Error: " + m_varnames[comp] + " is not a known field output type");
+        }
     }
     AddRZModesToDiags( lev );
 }