WOLA analysis module takes input block of only power of 2. I remember the input size was more flexible. This causes a problem if the target core basic block size is not a power of 2, e.g. if the basic block size is 48, we cannot find a power of 2 input block size. We could handle this by adding rebuffer in front of WOLA, but it's tedious.
I'm using the version 8.B.1.4.B