Oblique cancellation with plain TeX

Donald Arseneau asnd at triumf.ca
Sun Aug 4 04:38:33 CEST 2019

Rodolfo Medina<rodolfo.medina at gmail.com>   and  David Carlisle write:

\input picture

\let\line\LaTeX at line

  Undefined control sequence.
\@cancel ...eight \unitlength \p@ \canc at thinlines
                                                   {\/\raise \dimen@ \hbox {\...

Hmm, that probably means that \thinlines was undefined, because cancel.sty does
  \let\canc at thinlines\thinlines

Maybe put \show\thinlines in the document after \input picture.
Check for a definition of \thinlines in autopict.sty.
Maybe post the versions of each of those files.

Donald Arseneau,    TRIUMF CMMS,    604-222-1047x6295

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