Cannot use \toprule when doing \input inside tabular -- why?
\input
is trying to be intelligent, and this seems to be upsetting LaTeX's picky tabular definition.
But you can access the original \input
primitive from TeX which is less dangerous at this point.
After defining
\makeatletter
\newcommand\primitiveinput[1]
{\@@input #1 }
\makeatother
using \primitiveinput
inside the tabular should work.
Some commands e.g. \toprule
, \hline
or \multicolumn
must come directly at the start of a cell. There can't be anything before, this includes commands like \input
.