Hello,
The error you are facing is due to unexpected input for BPSK Modulator Baseband block. This block expects the input to be an integer from 0 to M-1.
The cause of the invalid input value is the M value that has been set for Random Integer Source block, i.e it has been set to 8, while all the other blocks of the model use M = 2 for BPSK.
This issue can be resolved by changing the set size (M value) in the Block parameters of Random Integer Source block to 2.
