diff --git a/snapshotprocessor.py b/snapshotprocessor.py
index 73601cf..8e9b0f3 100644
--- a/snapshotprocessor.py
+++ b/snapshotprocessor.py
@@ -504,8 +504,9 @@ class SnapshotProcessor(HDF5Container):
                 hdf5 = tables.open_file(filename, mode="w")
                 try:
                     for key in data:
-                        hdf5.create_array(
-                            "/data", key, data[key], "", createparents=True
+                        if len(data[key] > 0):
+                            hdf5.create_array(
+                                "/data", key, data[key], "", createparents=True
                         )
                 finally:
                     hdf5.close()