Long term transactions for which basis is not reported to the IRS

On form 1099-B, I have a section for long term transactions for which basis is not reported to the IRS.  The instructions say to report on Form 8949 with box E checked and/or Schedule D, Part II.  When I try to report the transactions on Schedule D, a box opens to add form 8949, but it says Form(s) 8949 are created automatically based on Schedule D input, and it doesn't add the form. When I try to add form 8949 directly, I get the same message.  Do I need to override Schedule D Part II line 9 so I can enter the information?  They are all straightforward sales transactions (nothing in columns 1f or 1g, for example).