diff --git a/src/constraints/conversion_2.mzn b/src/constraints/conversion_2.mzn
index fcaf9eedfdd03238d56c39aaee639f228cc4f116..ba628db8e718829b8b72fe91a6d7309b438267c2 100644
--- a/src/constraints/conversion_2.mzn
+++ b/src/constraints/conversion_2.mzn
@@ -287,17 +287,15 @@ array [1..n_operations] of 1..n_locations : operations_destination; % Локац
         array [1..n_loading_op] of int : loading_op_delta;
         array [1..n_loading_op] of 1..n_operations : loading_op_n; % Номера среди общего списка операций.
 
-        int : involved_operations_max_size;
-        array [1..n_obj_with_storage, 1..n_cargo_types] of 0..involved_operations_max_size : involved_operations_sizes;
-        array [1..n_obj_with_storage, 1..n_cargo_types, 1..involved_operations_max_size] of 1..n_loading_op : involved_operations;
+        array [1..n_obj_with_storage, 1..n_cargo_types] of set of 1..n_loading_op : involved_operations;
 
         constraint forall (storage in 1..n_obj_with_storage, cargo in 1..n_cargo_types, t in 1..(n_intervals + 1)) (
-            storage_used_volume[storage, t, cargo] == (
+            storage_used_volume[storage, t, cargo] = (
                 storage_used_volume[storage, t - 1, cargo] +
                 cargo_flows[storage, t, cargo] +
-                sum (inv_op_no in 1..involved_operations_sizes[storage, cargo]) (
-                    loading_op_delta[involved_operations[storage, cargo, inv_op_no]] *
-                    op_status[loading_op_n[involved_operations[storage, cargo, inv_op_no]], t]
+                sum (inv_op in involved_operations[storage, cargo]) (
+                    loading_op_delta[inv_op] *
+                    op_status[loading_op_n[inv_op], t]
                 )
             )
         );
diff --git a/src/inport/ConversionUtil.java b/src/inport/ConversionUtil.java
index a05fb092fcfabe7778cbd4b4e95dafe6a6e12349..0be5821cd8ad1c2c8fd391f1f022e1a5993d12b3 100644
--- a/src/inport/ConversionUtil.java
+++ b/src/inport/ConversionUtil.java
@@ -768,8 +768,11 @@ public class ConversionUtil {
                 }
             }
             writer.write("n_loading_op = " + loadingOpDelta.size() + ";\n");
-//                write2DArrayOfSet(writer, "involved_operations", involvedOperations);
-            write2DArrayOfSetAs3DArray(writer, "involved_operations", involvedOperations);
+            if (task.isTypified()) {
+                write2DArrayOfSet(writer, "involved_operations", involvedOperations);
+            } else {
+                write2DArrayOfSetAs3DArray(writer, "involved_operations", involvedOperations);
+            }
             writeArray(writer, "loading_op_delta", loadingOpDelta);
             writeArray(writer, "loading_op_n", loadingOpN, (Integer i) -> i + 1);
             writer.write("\n");