same issue, talked to and exchanged email with Interactive Brokers support,they say tax forms are completed (and pdf of 1099 is available in Reports),but still ...
Having the exact same issue and error message from Turbotax.Please post if you find a solution, I really do not want to enter all the consolidated 1099 forms by...
I was able to get around this problem by adding a K-1 16C entry (Gross income at partner level) that equaled the sum of 16D-F; then was able to file finally!!
