Hi, I'm having a problem regarding this equation:
                                                           sum(v(i), i = 1 .. 28)

where, v is a Data Table created under the Components Tab with 28 Rows, and 1 Column.

I keep on getting an error of: 

                                                     Error, unsupported type of index, i

I didn't use or declare 'i' in any part of the program.

Thank you for your help!