diff --git a/src/optinode.jl b/src/optinode.jl
index 87c92b2..bf23cdd 100644
--- a/src/optinode.jl
+++ b/src/optinode.jl
@@ -387,7 +387,8 @@ end
 
 function _copy_model_to!(node::OptiNode, model::JuMP.Model)
     if !(num_variables(node) == 0 && num_constraints(node) == 0)
-        error("An optinode must be empty to set a JuMP Model.")
+        error("An optinode must be empty to set a JuMP Model. Plasmo.jl does not 
+            yet support re-writing an optinode.")
     end
     # get backends
     src = JuMP.backend(model)
@@ -435,5 +436,102 @@ function _copy_model_to!(node::OptiNode, model::JuMP.Model)
     new_moi_obj_func = MOIU.map_indices(index_map, obj_func)
     new_obj_func = JuMP.jump_function(node, new_moi_obj_func)
     JuMP.set_objective(node, JuMP.objective_sense(model), new_obj_func)
+
+    # copy object dictionary
+    # need to create equivalent containers
+    for (key, value) in JuMP.object_dictionary(model)
+        _copy_object_dict_data(index_map, node, key, value)
+    end
+
+    return index_map
+end
+
+function _copy_object_dict_data(
+    index_map::MOIU.IndexMap, node::OptiNode, symbol::Symbol, value
+)
+    node[symbol] = value
+    return nothing
+end
+
+function _copy_object_dict_data(
+    index_map::MOIU.IndexMap,
+    node::OptiNode,
+    symbol::Symbol,
+    value::Union{JuMP.VariableRef,JuMP.ConstraintRef},
+)
+    source_index = JuMP.index(value)
+    dest_index = index_map[source_index]
+    node_ref = graph_backend(node).graph_to_element_map[dest_index]
+    node[symbol] = node_ref
+    return nothing
+end
+
+function _copy_object_dict_data(
+    index_map::MOIU.IndexMap,
+    node::OptiNode,
+    symbol::Symbol,
+    array::AbstractArray{<:JuMP.VariableRef},
+)
+    node_data = similar(array, NodeVariableRef)
+    source_inds = JuMP.index.(array)
+    for (i, source_index) in enumerate(source_inds)
+        dest_index = index_map[source_index]
+        node_ref = graph_backend(node).graph_to_element_map[dest_index]
+        node_data[i] = node_ref
+    end
+    node[symbol] = node_data
+    return nothing
+end
+
+function _copy_object_dict_data(
+    index_map::MOIU.IndexMap,
+    node::OptiNode,
+    symbol::Symbol,
+    array::AbstractArray{<:JuMP.ConstraintRef},
+)
+    node_data = similar(array, ConstraintRef)
+    source_inds = JuMP.index.(array)
+    for (i, source_index) in enumerate(source_inds)
+        dest_index = index_map[source_index]
+        node_ref = graph_backend(node).graph_to_element_map[dest_index]
+        node_data[i] = node_ref
+    end
+    node[symbol] = node_data
+    return nothing
+end
+
+function _copy_object_dict_data(
+    index_map::MOIU.IndexMap,
+    node::OptiNode,
+    symbol::Symbol,
+    daa::JuMP.Containers.DenseAxisArray{<:JuMP.VariableRef},
+)
+    node_data = similar(daa.data, NodeVariableRef)
+    source_inds = JuMP.index.(daa.data)
+    for (i, source_index) in enumerate(source_inds)
+        dest_index = index_map[source_index]
+        node_ref = graph_backend(node).graph_to_element_map[dest_index]
+        node_data[i] = node_ref
+    end
+    node_daa = JuMP.Containers.DenseAxisArray(node_data, daa.axes...)
+    node[symbol] = node_daa
+    return nothing
+end
+
+function _copy_object_dict_data(
+    index_map::MOIU.IndexMap,
+    node::OptiNode,
+    symbol::Symbol,
+    daa::JuMP.Containers.DenseAxisArray{<:JuMP.ConstraintRef},
+)
+    node_data = similar(daa.data, ConstraintRef)
+    source_inds = JuMP.index.(daa.data)
+    for (i, source_index) in enumerate(source_inds)
+        dest_index = index_map[source_index]
+        node_ref = graph_backend(node).graph_to_element_map[dest_index]
+        node_data[i] = node_ref
+    end
+    node_daa = JuMP.Containers.DenseAxisArray(node_data, daa.axes...)
+    node[symbol] = node_daa
     return nothing
 end
diff --git a/test/test_aggregate.jl b/test/test_aggregate.jl
index 81b87dc..15dc396 100644
--- a/test/test_aggregate.jl
+++ b/test/test_aggregate.jl
@@ -41,8 +41,8 @@ function _create_test_model()
     model = Model()
     @variable(model, x[1:10] >= 0)
     @variable(model, y[1:5] >= 2)
-    @constraint(model, [j = 1:5], x[j] + y[j] <= 10)
-    @constraint(model, sum(x) <= y[1]^4)
+    @constraint(model, cons[j=1:5], x[j] + y[j] <= 10)
+    @constraint(model, sum_con_ref, sum(x) <= y[1]^4)
     @objective(model, Min, sum(x) + sum(y)^3)
     return model
 end
@@ -79,6 +79,12 @@ function test_set_model()
 
     @test objective_value(m) == objective_value(graph, n1)
     @test value.(all_variables(m)) == value.(graph, all_variables(n1))
+
+    node_vars = all_variables(n1)
+    @test n1[:x] == node_vars[1:10]
+    @test n1[:y] == node_vars[11:15]
+    @test (n1, :cons) in keys(Plasmo.node_object_dictionary(n1))
+    @test (n1, :sum_con_ref) in keys(Plasmo.node_object_dictionary(n1))
 end
 
 function test_aggregate_to_depth()