以下代码有效：
\documentclass[a4paper, 12pt, oneside]{book}
\usepackage{tikz-uml}
\usepackage[utf8x]{inputenc}
\usepackage[english]{babel}
\begin{document}
\begin{tikzpicture}
\begin{umlpackage}[x=0, y=0, type=class] {hi}
\end{umlpackage}
\end{tikzpicture}
\end{document}
但是，当我添加希伯来语作为其中一种语言babel用途时：
\usepackage[english,hebrew]{babel}
代码无法编译！除了俄语之外，用任何其他语言都无法编译。知道为什么会发生这种情况吗？
错误：
! Missing number, treated as zero.
<to be read again>
\protect
l.12 ...gin{umlpackage}[x=0, y=0, type=class] {hi}
?
! Missing = inserted for \ifnum.
<to be read again>
\protect
l.12 ...gin{umlpackage}[x=0, y=0, type=class] {hi}
?
! Missing number, treated as zero.
<to be read again>
\protect
l.12 ...gin{umlpackage}[x=0, y=0, type=class] {hi}
?
Missing character: There is no 0 in font nullfont!
Missing character: There is no > in font nullfont!
Missing character: There is no 0 in font nullfont!
! Undefined control sequence.
\\umlpackage ...parent {\tikzumlPackage@parentold
@@\tikzumlPackage@nameold ...
l.12 ...gin{umlpackage}[x=0, y=0, type=class] {hi}
?
! Undefined control sequence.
\\umlpackage ...rentold @@\tikzumlPackage@nameold
}\else \def \tikzumlPackag...
l.12 ...gin{umlpackage}[x=0, y=0, type=class] {hi}
?
Missing character: There is no h in font nullfont!
Missing character: There is no i in font nullfont!
Missing character: There is no h in font nullfont!
Missing character: There is no i in font nullfont!
! Missing \endcsname inserted.
<to be read again>
\protect
l.13 \end{umlpackage}
?
Missing character: There is no 0 in font nullfont!
! Extra \endcsname.
\pgfutil@ifundefined ...\ifx \csname #1\endcsname
\relax \expandafter \pgfut...
l.13 \end{umlpackage}
?
! Package pgf Error: Sorry, the requested layer 'package\@@number{0}' could not
be found. Maybe you misspelled it?.
See the pgf package documentation for explanation.
Type H <return> for immediate help.
...
l.13 \end{umlpackage}
?
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <10.95> on input line 13.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <8> on input line 13.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <6> on input line 13.
! LaTeX Error: \begin{scope} on input line 12 ended by \end{pgfonlayer}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.13 \end{umlpackage}
?
! LaTeX Error: \begin{umlpackage} on input line 12 ended by \end{scope}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.13 \end{umlpackage}
?
! LaTeX Error: \begin{tikzpicture} on input line 11 ended by \end{umlpackage}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.13 \end{umlpackage}
?
! Undefined control sequence.
\pgfsys@call@end ->\pgfsys@end@save
\pgfsys@endscope
l.14 \end{tikzpicture}
?
! Undefined control sequence.
\endpgfscope ...pgflinewidth =\pgfscope@linewidth
\global \let \pgf@strokeco...
l.14 \end{tikzpicture}
?
! Missing number, treated as zero.
<to be read again>
\global
l.14 \end{tikzpicture}
?
! Illegal unit of measure (pt inserted).
<to be read again>
\global
l.14 \end{tikzpicture}
?
! Missing } inserted.
<inserted text>
}
l.14 \end{tikzpicture}
?
! Extra }, or forgotten \endgroup.
\endpgfpicture ...globally \endgroup \hss \egroup
\pgf@restore@layerlist@fro...
l.14 \end{tikzpicture}
?
! Missing } inserted.
<inserted text>
}
l.14 \end{tikzpicture}
?
! Extra }, or forgotten \endgroup.
\endpgfpicture ...dpicture \endgroup \hss \egroup
\pgfsys@typesetpicturebox ...
l.14 \end{tikzpicture}
?
! LaTeX Error: \begin{document} ended by \end{tikzpicture}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.14 \end{tikzpicture}
?
! Extra \endgroup.
<recently read> \endgroup
l.14 \end{tikzpicture}
?
! Infinite glue shrinkage found in a paragraph.
l.15
请注意，我可以在我的计算机上编译希伯来语，而无需tikz-uml。