diff --git a/gcamreader/ModelInterface/ModelInterface.jar b/gcamreader/ModelInterface/ModelInterface.jar
index 7c08da4..78b3f83 100644
Binary files a/gcamreader/ModelInterface/ModelInterface.jar and b/gcamreader/ModelInterface/ModelInterface.jar differ
diff --git a/gcamreader/querymi.py b/gcamreader/querymi.py
index 59456df..72f0ef6 100644
--- a/gcamreader/querymi.py
+++ b/gcamreader/querymi.py
@@ -110,7 +110,7 @@ def _parserslt(txt, warn_empty, title, stderr=""):
         # just be listing the scenario information and no aggregation
         # is necessary
         if cols.str.contains(value_col_name).any():
-            rslt = rslt.groupby(cols.drop(value_col_name).to_list(), as_index=False).sum()
+            rslt = rslt.groupby(cols.drop(value_col_name).to_list(), as_index=False, dropna=False).sum()
     except EmptyDataError:
         if warn_empty:
             sys.stderr.write("Model interface returned empty string.\n")