根据tkz-euclide的文档，以下 MnWE
\documentclass{article}
\usepackage{tkz-euclide}
\begin{document}
\begin{tikzpicture}
\tkzDefPoint(0,0){A}
\tkzDefPoint(4,0){B}
\tkzDrawTriangle(A,B)
\end{tikzpicture}
\end{document}
应该可以很好地编译（并且，IIRC，它曾经是这种情况）但是，使用最新的 TL 2016，会引发以下错误：
! Undefined control sequence.
l.12 \tkzDrawTriangle
(A,B)
这是我的文件列表：
*File List*
article.cls 2014/09/29 v1.4h Standard LaTeX document class
size10.clo 2014/09/29 v1.4h Standard LaTeX file (size option)
tkz-euclide.sty 2011/06/01 1.16 c for plots 2d
tkz-base.sty 2011/06/01 1.16 c tkz-base
etex.sty 2016/08/01 v2.7 eTeX basic definition package (PEB,DPC)
tikz.sty 2015/08/07 v3.0.1a (rcs-revision 1.151)
pgf.sty 2015/08/07 v3.0.1a (rcs-revision 1.15)
pgfrcs.sty 2015/08/07 v3.0.1a (rcs-revision 1.31)
everyshi.sty 2001/05/15 v3.00 EveryShipout Package (MS)
pgfrcs.code.tex
pgfcore.sty 2010/04/11 v3.0.1a (rcs-revision 1.7)
graphicx.sty 2014/10/28 v1.0g Enhanced LaTeX Graphics (DPC,SPQR)
keyval.sty 2014/10/28 v1.15 key=value parser (DPC)
graphics.sty 2016/07/10 v1.0t Standard LaTeX Graphics (DPC,SPQR)
trig.sty 2016/01/03 v1.10 sin cos tan (DPC)
graphics.cfg 2016/06/04 v1.11 sample graphics configuration
pdftex.def 2016/07/10 v0.06j Graphics/color for pdfTeX
infwarerr.sty 2016/05/16 v1.4 Providing info/warning/error messages (HO)
ltxcmds.sty 2016/05/16 v1.23 LaTeX kernel commands for general use (HO)
pgfsys.sty 2014/07/09 v3.0.1a (rcs-revision 1.48)
pgfsys.code.tex
pgfsyssoftpath.code.tex 2013/09/09 (rcs-revision 1.9)
pgfsysprotocol.code.tex 2006/10/16 (rcs-revision 1.4)
xcolor.sty 2016/05/11 v2.12 LaTeX color extensions (UK)
color.cfg 2016/01/02 v1.6 sample color configuration
pgfcore.code.tex
pgfcomp-version-0-65.sty 2007/07/03 v3.0.1a (rcs-revision 1.7)
pgfcomp-version-1-18.sty 2007/07/23 v3.0.1a (rcs-revision 1.1)
pgffor.sty 2013/12/13 v3.0.1a (rcs-revision 1.25)
pgfkeys.sty
pgfkeys.code.tex
pgfmath.sty
pgfmath.code.tex
pgffor.code.tex
tikz.code.tex
numprint.sty 2012/08/20 v1.39 Print numbers (HH)
array.sty 2014/10/28 v2.4c Tabular extension package (FMi)
fp.sty 1995/04/02
defpattern.sty 1994/10/12
fp-basic.sty 1996/05/13
fp-addons.sty 1995/03/15
fp-snap.sty 1995/04/05
fp-exp.sty 1995/04/03
fp-trigo.sty 1995/04/14
fp-pas.sty 1994/08/29
fp-random.sty 1995/02/23
fp-eqn.sty 1995/04/03
fp-upn.sty 1996/10/21
fp-eval.sty 1995/04/03
tkz-tools-utilities.tex
tkz-tools-arith.tex
tkz-tools-base.tex
tkz-tools-misc.tex
tkz-tools-math.tex
tkz-obj-points.tex
tkz-obj-segments.tex
tkz-obj-marks.tex
tkz-tools-intersections.tex
tkz-tools-transformations.tex
tkz-obj-lines.tex
tkz-lib-symbols.tex
tkz-obj-circles.tex
tkz-obj-addpoints.tex
supp-pdf.mkii
pdftexcmds.sty 2016/05/21 v0.22 Utility functions of pdfTeX for LuaTeX (HO)
ifluatex.sty 2016/05/16 v1.4 Provides the ifluatex switch (HO)
ifpdf.sty 2016/05/14 v3.1 Provides the ifpdf switch
epstopdf-base.sty 2016/05/15 v2.6 Base part for package epstopdf
grfext.sty 2016/05/16 v1.2 Manage graphics extensions (HO)
kvdefinekeys.sty 2016/05/16 v1.4 Define keys (HO)
kvoptions.sty 2016/05/16 v3.12 Key value format for package options (HO)
kvsetkeys.sty 2016/05/16 v1.17 Key value parser (HO)
etexcmds.sty 2016/05/16 v1.6 Avoid name clashes with e-TeX commands (HO)
epstopdf-sys.cfg 2010/07/13 v1.3 Configuration of (r)epstopdf for TeX Live
***********
答案1
添加
\usetkzobj{all}
而且效果很好。