Good afternoon, I updated my TL-2011 packages today. Now, expl3 doesn't work anymore. \listfiles \documentclass{minimal} \usepackage{expl3} \begin{document} \ExplSyntaxOn \tl_new:Nn\g_example_tl{hello!} \g_example_tl \ExplSyntaxOff \end{document} leads to: ! Undefined control sequence. l.8 \tl_new:Nn \g_example_tl{hello!} ? q What is going on? Regards, Alexander *File List* minimal.cls 2001/05/25 Standard LaTeX minimal class expl3.sty 2011/10/09 v2900 L3 Experimental code bundle wrapper l3names.sty 2011/10/09 v2896 L3 Experimental namespace for primitives l3bootstrap.sty 2011/09/10 v2798 L3 Experimental bootstrap code etex.sty 1998/03/26 v2.0 eTeX basic definition package (PEB) calc.sty 2007/08/22 v4.3 Infix arithmetic (KKT,FJ) color.sty 2005/11/14 v1.0j Standard LaTeX Color (DPC) color.cfg 2007/01/18 v1.5 color configuration of teTeX/TeXLive dvips.def 1999/02/16 v3.0i Driver-dependant file (DPC,SPQR) dvipsnam.def 1999/02/16 v3.0i Driver-dependant file (DPC,SPQR) graphics.sty 2009/02/05 v1.0o Standard LaTeX Graphics (DPC,SPQR) trig.sty 1999/03/16 v1.09 sin cos tan (DPC) graphics.cfg 2010/04/23 v1.9 graphics configuration of TeX Live l3basics.sty 2011/10/09 v2896 L3 Experimental basic definitions l3expan.sty 2011/10/09 v2896 L3 Experimental argument expansion l3tl.sty 2011/09/16 v2831 L3 Experimental token lists l3seq.sty 2011/10/09 v2896 L3 Experimental sequences and stacks l3int.sty 2011/10/09 v2896 L3 Experimental integers l3quark.sty 2011/10/09 v2896 L3 Experimental quarks l3prg.sty 2011/10/09 v2896 L3 Experimental control structures l3clist.sty 2011/10/09 v2896 L3 Experimental comma separated lists l3token.sty 2011/10/09 v2896 L3 Experimental token manipulation l3prop.sty 2011/09/17 v2839 L3 Experimental property lists l3msg.sty 2011/10/09 v2896 L3 Experimental messages l3io.sty 2011/10/09 v2896 L3 Experimental input-output operations l3file.sty 2011/10/09 v2896 L3 Experimental file operations l3skip.sty 2011/10/09 v2896 L3 Experimental dimensions and skips l3keys.sty 2011/09/10 v2800 L3 Experimental key-value interfaces l3fp.sty 2011/09/26 v2857 L3 Experimental floating-point operations l3box.sty 2011/10/09 v2896 L3 Experimental boxes l3coffins.sty 2011/09/12 v2814 L3 Experimental coffin code layer l3color.sty 2011/09/07 v2776 L3 Experimental colour support l3luatex.sty 2011/09/10 v2798 L3 Experimental LuaTeX-specific functions ***********