Adjust Gain flag produces error

[scottfurry]

uname: 3.14.4-1-ARCH
split2flac -v:
"split2flac version: 114
shntool 3.0.10
flac 1.3.0
--- Monkey's Audio Console Front End (v 3.99) (c) Matthew T. Ashland ---
FAAC 1.28
LAME 64bits version 3.99.5 (http://lame.sf.net)"

set flag -g to adjust gain.
error message produced during output
"Adjusting gain
/usr/bin/split2flac: line 650: [: argument expected"

script did not terminate abnormally