*\texcls.1 ! Undefined control sequence. (*) \texcls .1 ↑2 (*) \texcls.1 ↑ *\input texcls.1 (texcls.1 1 2 (basic.TEX 1 2 3 4) ! Undefined control sequence. p.2,l.6 This is a silly little test of \TEX . ↑i *TEX ! You can't do that in horizontal mode. p.2,l.16 \vskip 50pt ↑i *\par\vskip ) *\vfill\end [1]