small change.

examples/CMakeLists.txt

 set(SUBDIRS callback dgf loadbalance backuprestore communication testEfficiency)
 
 set(examplesdir  ${CMAKE_INSTALL_INCLUDEDIR}/examples)
-set(examples_HEADERS adaptation.hh  
-                     diagnostics.hh  
-                     paralleldgf.hh        
-                     problem-ball.hh   
+set(examples_HEADERS adaptation.hh
+                     diagnostics.hh
+                     paralleldgf.hh
+                     problem-ball.hh
                      problem-transport.hh
-                     datamap.hh     
-                     fvscheme.hh     
-                     piecewisefunction.hh  
-                     problem-euler.hh  
+                     datamap.hh
+                     fvscheme.hh
+                     piecewisefunction.hh
+                     problem-euler.hh
                      problem.hh)
 
 configure_file(alugrid.cfg ${CMAKE_CURRENT_BINARY_DIR}/alugrid.cfg COPYONLY)
@@ -24,7 +24,7 @@ foreach( variant ball euler transport )
   else()
     target_compile_definitions( ${prog} PRIVATE "${variant_upper}" )
   endif()
-  target_compile_definitions( ${prog} PUBLIC "ALUGRID_CUBE" "GRIDDIM=3" "WORLDDIM=3" )
+  target_compile_definitions( ${prog} PUBLIC "ALUGRID_CONFORM" "GRIDDIM=3" "WORLDDIM=3" )
 
   foreach( type cube simplex conform )
     string( TOUPPER ${type} type_upper )

examples/problem-ball.hh

@@ -35,6 +35,8 @@ struct BallData
       dgfFileName << path << "/dgf/cube_hc_4096.dgf";
     else if ( problem_ == 3 )
       dgfFileName << path << "/dgf/cube_hc_32768.dgf";
+    else if ( problem_ == 4 )
+      dgfFileName << path << "/dgf/input" << dimDomain << ".dgf";
     else
       dgfFileName << path << "/dgf/unitcube" << dimDomain << "d.dgf";
     return dgfFileName.str();