Error Connecting to Hana Analytical view from SAP predictive analytics

Hi,

I am trying to connect to a HANA Analytical view from Predictive analytics tool . I am getting the following error. Any insight into why i am getting this kind of error? It was working intially but as i started adding more columns to my Analytic view i am seeing this issue.

Data source creation failed :/java.lang.RuntimeExpection:Java.lang.NullPointerException

thanks

Kumar