variable issue is solved, close this issue

run_mixed_sampling.py

@@ -22,6 +22,7 @@ def main(parser_args):
                 test_end="2011-12-31",
                 stations=["DEBW107", "DEBW013"],
                 epochs=100,
+                network="UBA",
                 )
     workflow = DefaultWorkflow(**args)
     workflow.run()