Short description of error
Running python -m bam.pack --input <input> --output <output> will not pack simulation cache data (I've only tested with particle cache)
Exact steps for others to reproduce the error
Unzip the attached file and notice that the blend file has a simulation cache. Than run the following commands:
cd <path to source> python -m bam.pack --input bam_pack_bug.blend --output ../output/packed.blend --mode FILE
If you open up the packed file you'll see that there isn't any cache data for the particles.