diff --git a/src/python/otsim/io/io.py b/src/python/otsim/io/io.py
index 4abe34a..9a4e150 100644
--- a/src/python/otsim/io/io.py
+++ b/src/python/otsim/io/io.py
@@ -31,6 +31,8 @@ def get_type(typ: str) -> DataType:
       return DataType.boolean
     elif typ == 'double':
       return DataType.double
+    elif typ == 'vector':
+      return DataType.vector
     else:
       return None
 
@@ -170,8 +172,11 @@ def action_subscriptions(self: IO, data: typing.Dict, _):
       tag = self.tags[k]
 
       if not tag: continue
-
-      points.append({'tag': tag, 'value': float(v), 'ts': 0})
+      if isinstance(v, list):
+        for i, x in enumerate(v):
+          points.append({'tag': f'{tag}_{i}', 'value': float(x), 'ts': 0})
+      else:
+        points.append({'tag': tag, 'value': float(v), 'ts': 0})
       self.metrics.incr_metric('helics_sub_count')
 
     if len(points) > 0: