diff --git a/goalie/go_mesh_seq.py b/goalie/go_mesh_seq.py
index af5908d..6b32ed2 100644
--- a/goalie/go_mesh_seq.py
+++ b/goalie/go_mesh_seq.py
@@ -241,8 +241,7 @@ def indicate_errors(
 
             # delete current subinterval enriched mesh to reduce the memory footprint
             enriched_mesh_seq.meshes.pop(-1)
-            enriched_mesh_seq.time_partition.num_subintervals -= 1
-            enriched_mesh_seq.time_partition.timesteps.pop(-1)
+            enriched_mesh_seq.time_partition.drop_last_subinterval()
             enriched_mesh_seq._update_function_spaces()
 
         return self.solutions, self.indicators
diff --git a/goalie/time_partition.py b/goalie/time_partition.py
index 0a080cb..604bf63 100644
--- a/goalie/time_partition.py
+++ b/goalie/time_partition.py
@@ -292,6 +292,19 @@ def __ne__(self, other):
             or not self.field_types == other.field_types
         )
 
+    def drop_last_subinterval(self):
+        """
+        Drop the last subinterval and reset lists and counters appropriately.
+        """
+        self.end_time = self.subintervals[-1][0]
+        self.interval = (self.start_time, self.end_time)
+        self.num_subintervals -= 1
+        self.timesteps.pop(-1)
+        self.subintervals.pop(-1)
+        self.num_timesteps_per_subinterval.pop(-1)
+        self.num_timesteps_per_export.pop(-1)
+        self.num_exports_per_subinterval.pop(-1)
+
 
 class TimeInterval(TimePartition):
     """