B.14 Illegal character in array arg
You have used a character in the argument of a tabular or array environment that is not allowed. The standard available characters are: r (right justified), l (left justified), c (centred) and p, as well as @{<inter-col text>}. Remember that if you want to use the >{<decl>} or <{<decl>} specifiers, you must include the array package.
This error will also occur if you have forgotten the argument to the tabular or array environment.
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