no silent crash

src/IO.f90

@@ -529,6 +529,8 @@ subroutine IO_error(error_ID,el,ip,g,instance,ext_msg)
       msg = 'unknown material parameter:'
     case (211)
       msg = 'material parameter out of bounds:'
+    case (212)
+      msg = 'nonlocal model not supported'
 
 !--------------------------------------------------------------------------------------------------
 ! numerics error messages

src/constitutive_plastic_nonlocal.f90

@@ -387,6 +387,10 @@ module subroutine plastic_nonlocal_init
     call material_allocateState(plasticState(p),NipcMyPhase,sizeState,sizeDotState,sizeDeltaState)
 
     plasticState(p)%nonlocal = config%KeyExists('/nonlocal/')
+    if(plasticState(p)%nonlocal .and. .not. allocated(geometry_plastic_nonlocal_IPneighborhood)) &
+      call IO_error(212,ext_msg='IPneighborhood does not exist')
+
+
     plasticState(p)%offsetDeltaState = 0                                                            ! ToDo: state structure does not follow convention
 
     st0%rho => plasticState(p)%state0                             (0*prm%sum_N_sl+1:10*prm%sum_N_sl,:)

src/grid/discretization_grid.f90

@@ -118,6 +118,7 @@ subroutine discretization_grid_init(restart)
     call results_addAttribute('origin',origin,  'geometry')
     call results_closeJobFile
   endif
+
 !--------------------------------------------------------------------------------------------------
 ! geometry information required by the nonlocal CP model
   call geometry_plastic_nonlocal_setIPvolume(reshape([(product(mySize/real(myGrid,pReal)),j=1,product(myGrid))], &

src/marc/discretization_marc.f90

@@ -119,6 +119,7 @@ subroutine discretization_marc_init
   unscaledNormals = IPareaNormal(elem,nElems,connectivity_cell,node0_cell)
   call geometry_plastic_nonlocal_setIParea(norm2(unscaledNormals,1))
   call geometry_plastic_nonlocal_setIPareaNormal(unscaledNormals/spread(norm2(unscaledNormals,1),1,3))
+  !call geometry_plastic_nonlocal_setIPneighborhood                                                 ToDo: Support nonlocal
   call geometry_plastic_nonlocal_results
   
 end subroutine discretization_marc_init