**'Selective_Scan_Cuda' Error? Don'T Panic! This Works Every Time**
# partial(build_selective_scan_fn(selective_scan_cuda_core, mode=mode, tag=f1b2), u, delta, a, b, c, d, z, delta_bias, delta_softplus, return_last_state=true, nrows=1, backnrows=2), #....