The first thing that comes to mind is that you’ve somehow not set up the DSN correctly. This error in my experience occurs when the adapter simply can’t find the connection it’s looking for, as opposed to getting a connection timeout or a connection refused. I would make sure that you created a 64-bit DSN using Microsoft Access Driver, and just in case, when creating the data source, I would try choosing the “Select Automatically” when selecting the database adapter. You can find more details regarding creating ODBC data sources in denodo [here](https://community.denodo.com/docs/html/browse/6.0/vdp/administration/creating_views/importing_data_sources_and_creating_base_views/odbc_sources).
Hope this helps!