diff --git a/lib/galaxy/datatypes/tabular.py b/lib/galaxy/datatypes/tabular.py
index fab0b5893334..68e64fcce99a 100644
--- a/lib/galaxy/datatypes/tabular.py
+++ b/lib/galaxy/datatypes/tabular.py
@@ -1814,7 +1814,7 @@ def set_meta(
             with open(dataset.get_file_name()) as dataset_fh:
                 comment_lines = 0
                 column_headers = None
-                cleaned_column_types = None
+                cleaned_column_types = []
                 number_of_columns = 0
                 for i, line in enumerate(dataset_fh):
                     line = line.strip("\n")
@@ -1822,7 +1822,6 @@ def set_meta(
                         if line.startswith("#h"):
                             column_headers = line.split("\t")[1:]
                         elif line.startswith("#f"):
-                            cleaned_column_types = []
                             for column_type in line.split("\t")[1:]:
                                 if column_type == "Hex":
                                     cleaned_column_types.append("str")
diff --git a/lib/galaxy/tools/parameters/basic.py b/lib/galaxy/tools/parameters/basic.py
index 9b5a8f5fde9c..ae6b10e0001a 100644
--- a/lib/galaxy/tools/parameters/basic.py
+++ b/lib/galaxy/tools/parameters/basic.py
@@ -1517,7 +1517,7 @@ def get_options(self, trans, other_values):
                 except Exception:
                     column_list = self.get_column_list(trans, other_values)
             if self.numerical:  # If numerical was requested, filter columns based on metadata
-                if hasattr(dataset, "metadata") and hasattr(dataset.metadata, "column_types"):
+                if hasattr(dataset, "metadata") and getattr(dataset.metadata, "column_types", None) is not None:
                     if len(dataset.metadata.column_types) >= len(column_list):
                         numerics = [i for i, x in enumerate(dataset.metadata.column_types) if x in ["int", "float"]]
                         column_list = [column_list[i] for i in numerics]