After looking into this further it definitely appears to be an issue with the calculation view in HANA and how it is working with data services. I have a different calculation view that is almost identical (15 fewer fields) and all fields are NVARCHAR in HANA. When I import that one and build a simple load to a template table it runs with no warnings. I suspect this has something to do with the way the calc view may be built in HANA but do not have a lot of HANA expertise. Are thre some things I can check in HANA or DS that may explain why it is working for one but not the other?
I have also tested this with HANA revision 82 and 85 and get the same results so I do not believe it has to do with the latest revision of HANA