一般フォーラム

縦書き文書の行頭鍵括弧の調整にbxjaprnindパッケージを導入しましたが，upLaTeXでの処理でエラーが発生します．

以下，その問題の再現を記載します．
作業環境はWindows8.1，W32TeX，upLaTeX+dvipdfmx，TeXworksです．

LaTeXコード(.tex)
------------------------------
%% Document class
\documentclass[a4paper,10pt,twocolumn]{utarticle}
\usepackage{lltjp-geometry}
\usepackage[pass,dvipdfm]{geometry}
\usepackage{bxjaprnind}

%% Font command
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[uplatex]{otf}
\usepackage{lmodern}
\renewcommand{\rmdefault}{ptm}
\usepackage[scaled]{helvet}
\frenchspacing

\begin{document}

彼女は尋ねた．

「どうして？」

彼はため息をつきながら答えた．

「誠に残念な事だが、ここは現実世界だ」

「それは解っている！」

\end{document}
------------------------------

DOSコマンド(.bat)
------------------------------
uplatex -jobname="%~n1" -kanji=utf8 -no-guess-input-enc %1 && ^
uplatex -jobname="%~n1" -kanji=utf8 -no-guess-input-enc %1 && ^
dvipdfmx -f embase14.map -f hiraginopron.map "%~n1"
------------------------------

処理のログ（TeXworksのコンソール出力）
------------------------------
This is e-upTeX, Version 3.14159265-p3.7-u1.20-150805-2.6 (utf8.uptex) (TeX Live 2015/W32TeX) (preloaded format=uplatex)
restricted \write18 enabled.
entering extended mode
(./ut.tex
pLaTeX2e <2011/05/07u00>+0 (based on LaTeX2e <2015/10/01> patch level 2)
Babel <3.9m> and hyphenation patterns for 79 languages loaded.
(c:/w32tex/share/texmf-dist/tex/uplatex/base/utarticle.cls
Document Class: utarticle 2011/05/07 v1.6_u00 Standard upLaTeX class
(c:/w32tex/share/texmf-dist/tex/uplatex/base/utsize10.clo)
(c:/w32tex/share/texmf-dist/tex/platex/base/plext.sty))
(c:/w32tex/share/texmf-local/tex/latex/lltjp-geometry.sty
(c:/w32tex/share/texmf-dist/tex/generic/oberdiek/ifluatex.sty)
(c:/w32tex/share/texmf-dist/tex/latex/filehook/filehook.sty))
(c:/w32tex/share/texmf-dist/tex/latex/geometry/geometry.sty
(c:/w32tex/share/texmf-dist/tex/latex/graphics/keyval.sty)
(c:/w32tex/share/texmf-dist/tex/generic/oberdiek/ifpdf.sty)
(c:/w32tex/share/texmf-dist/tex/generic/oberdiek/ifvtex.sty)
(c:/w32tex/share/texmf-dist/tex/generic/ifxetex/ifxetex.sty)
(c:/w32tex/share/texmf-dist/tex/latex/geometry/geometry.cfg))
(c:/w32tex/share/texmf-dist/tex/latex/geometry/geometry.cfg)
(c:/w32tex/share/texmf-dist/tex/latex/bxjatool/bxjaprnind.sty
(c:/w32tex/share/texmf-dist/tex/latex/bxbase/bxtoolbox.sty
(c:/w32tex/share/texmf-dist/tex/latex/bxbase/bxtoolbox.def
(c:/w32tex/share/texmf-dist/tex/latex/etoolbox/etoolbox.sty))
(c:/w32tex/share/texmf-dist/tex/latex/bxbase/bxtoolbox-ext.def)
(c:/w32tex/share/texmf-dist/tex/latex/bxbase/bxtoolbox-ja.def
(c:/w32tex/share/texmf-dist/tex/latex/pxbase/pxbsjc.def)
! Improper alphabetic or KANJI constant.
<to be read again>
                  \@nil
l.129  \expandafter\bxtb@tmpb\bxtb@tmpa\@nil
                                           
?
------------------------------

エラーとされている部分
------------------------------
bxtoolbox-ja.def 129
Improper alphabetic or KANJI constant.
<to be read again>
                  \@nil
l.129  \expandafter\bxtb@tmpb\bxtb@tmpa\@nil
------------------------------

この問題への対処をご教授ください．よろしくお願いします．