LTE Receiver Framework

Hi. I downloaded the latest version of gnuradio( and complied
the code for the LTE Receiver framework. However I am having problems
with the results. I have attached the screenshot of the final output of
the LTE top level flowgraph. I am getting this “gr::log :INFO: MIB0 -
MIB decoding_rate = -nan” as an output. Is there a problem with my
input signal I generated it from Matlab LTE toolbox.Thanks