Here is how I solved this. Go to Form and to the line where the error message takes you. Then scroll down on the form until you find a section called Section A (it's on a linked worksheet I think but it seems continuous). There you will find a line, or several lines, to re-enter the total or totals from the statement at the end of the K-1, under codes Z. In my case, there were figures from rental income, and section 1231, and some figures relating to the total asset value. I just put in the rental income. It did not make a bit of difference in the tax calculation BTW.
