USRP Transmitter simulink input dimension error

When use a "From Workspace" block to send my data to the SDRuTransmitter, Simulink keep telling my my input data dimension is not correct.

Does anybody successfully use SDRutransmitter to send user-defined data? I think it is probably a bug?!

clear;
data.time=[linspace(0,1,10^7)]';
freq=1e6;
data.signals.values=double(sin(2*pi*freq.*data.time));
data.signals.dimensions= 1;
sim('system_block')

Answer 1

[Walter Roberson]

I think you should be sending a frame to the SDRu, not a scalar. See for example https://www.mathworks.com/help/supportpkg/usrpradio/examples/qpsk-transmitter-with-usrp-r-hardware-1.html