Did you attempt to use the Tableau connector called 'Actian Vectorwise' listed at the top of the data connection window? You should simply need to provide the name of your virtual node, and you should not need to connect using the generic option for 'Other data sources (ODBC)'.
Since you mentioned that you only have 64-bit drivers installed, you will have to use Tableau 8.1 to connect using those drivers. However just because your operating system is 64-bit does not mean that your applications have to be. Tableau 8.0 is a 32-bit application that runs fine on a 64-bit Windows system, and it can connect using 32-bit drivers installed on the same system. Please consider installing the 32-bit version of the Vectorwise drivers, if possible, or consider upgrading to Tableau 8.1.
I hope this helps,
I installed DBA Tools 32-bit version on my client, created a virtual node with that and it works with Tableau 8.1 64-bit !! The issue comes to the 64-bit version of DBA Tools because the 64-bit virtual node doesn't work with Tableau.
Thanks a lot for your help !!
You're welcome, JC, I'm glad that worked!