diff --git a/ymmsl/v0_2/tests/test_timeline_resolver.py b/ymmsl/v0_2/tests/test_timeline_resolver.py
index 44a0b7c..d81ea6f 100644
--- a/ymmsl/v0_2/tests/test_timeline_resolver.py
+++ b/ymmsl/v0_2/tests/test_timeline_resolver.py
@@ -149,3 +149,8 @@ def test_inconsistent_interact(timelines_configuration: Configuration) -> None:
 def test_model_ports(timelines_configuration: Configuration) -> None:
     model = timelines_configuration.models[Ref("model_ports")]
     resolve_timelines(model)
+
+
+def test_muscle_settings_in(timelines_configuration: Configuration) -> None:
+    model = timelines_configuration.models[Ref("qmc")]
+    resolve_timelines(model)
diff --git a/ymmsl/v0_2/tests/ymmsl1/timelines.ymmsl b/ymmsl/v0_2/tests/ymmsl1/timelines.ymmsl
index 8ce6b22..331105c 100644
--- a/ymmsl/v0_2/tests/ymmsl1/timelines.ymmsl
+++ b/ymmsl/v0_2/tests/ymmsl1/timelines.ymmsl
@@ -223,3 +223,18 @@ models:
       in: meso.in
       meso.final: macro.in
       macro.final: final
+
+  qmc:
+    components:
+      mc:
+        ports:
+          o_i: parameters_out
+          s: states_in
+        description: Monte Carlo driver for UQ.
+      sim:
+        ports:
+          o_f: state_out
+        description: Simulation
+    conduits:
+      mc.parameters_out: sim.muscle_settings_in
+      sim.state_out: mc.states_in
diff --git a/ymmsl/v0_2/timeline_resolver.py b/ymmsl/v0_2/timeline_resolver.py
index 6696127..efd4fa2 100644
--- a/ymmsl/v0_2/timeline_resolver.py
+++ b/ymmsl/v0_2/timeline_resolver.py
@@ -10,6 +10,7 @@
 )
 
 ROOT_TIMELINE = Timeline(":")
+MUSCLE_SETTINGS_IN = Identifier("muscle_settings_in")
 
 
 def resolve_timelines(model: Model) -> None:
@@ -172,6 +173,11 @@ def __init__(self, model: Model) -> None:
             for port_name, port in component.ports.items()
         }
         """Map of Port objects by their full reference"""
+        # Special ports:
+        for component in self._model.components.values():
+            self._all_ports[component.name + MUSCLE_SETTINGS_IN] = Port(
+                MUSCLE_SETTINGS_IN, Operator.F_INIT
+            )
 
         # Assign components to timelines
         for component in self._model.components.values():
@@ -187,6 +193,10 @@ def _f_init_conduits_for_component(self, component: Component) -> list[Conduit]:
                 conduit = self._conduits_by_receiver.get(component.name + port.name)
                 if conduit is not None:
                     result.append(conduit)
+        # Special ports:
+        conduit = self._conduits_by_receiver.get(component.name + MUSCLE_SETTINGS_IN)
+        if conduit is not None:
+            result.append(conduit)
         return result
 
     def _assign_component(