LIMESDR MIMO feature

Hello everyone,

I am trying to test the MIMO feature on LIMESDR and when I put it on MIMO mode, gnuradio tells me that I have a Port not connected both on Tx and Rx side. I have 4 antennas connected to Rx1_h, Rx2_h, Tx1_1 and Tx1_2, might this be the problem? Have anyone been able to test MIMO feature with gnuradio?

Thanks in advance.