我有一个包含数十个包的论文模板。当我使用 longtable 时，它给出了以下错误：
! Undefined control sequence.
\longtable ->\tpltable
l.266 \end{tabularx}
注意：下面的代码在模板外运行得很好。
\documentclass{article}
\usepackage{array, booktabs, multirow, longtable}
\usepackage{ltablex} % <-- added (as suggested by Bernard in his comment)
\begin{document}
\begin{tabularx}{\textwidth}{lXXXXXXXXX} % <-- changed from \begin{longtable}
\caption{List first page}
\label{tab:Ch2VCOB}\\
\toprule
& & \multicolumn{3}{l}{SD-heuristic} & & \multicolumn{4}{l}{SA-TH} \\
\cmidrule{3-5}\cmidrule{7-10} Test Instance & \multicolumn{1}{l}{Upper Bound} & \multicolumn{1}{l}{Obj} & \multicolumn{1}{l}{Gap (\%)} &
\multicolumn{1}{l}{Time} & & \multicolumn{1}{l}{Obj. (std.)} & \multicolumn{1}{l}{Gap (\%)} & \multicolumn{1}{l}{Best} & \multicolumn{1}{l}{Time} \\
\endfirsthead
\caption{continued from previous page} \\
\toprule
& & \multicolumn{3}{l}{SD-heuristic} & & \multicolumn{4}{l}{SA-TH} \\
\cmidrule{3-5}\cmidrule{7-10} Test Instance & \multicolumn{1}{l}{Upper Bound} & \multicolumn{1}{l}{Obj} & \multicolumn{1}{l}{Gap (\%)} &
\multicolumn{1}{l}{Time} & & \multicolumn{1}{l}{Obj. (std.)} & \multicolumn{1}{l}{Gap (\%)} & \multicolumn{1}{l}{Best} & \multicolumn{1}{l}{Time} \\
\endhead
\bottomrule
\endlastfoot
\tabularnewline
A\_2\_5\_1 & 85 & 85 & 0 & 13 & & 85 (0) & 0 & 85 & 0 \\
A\_2\_5\_2 & 160 & 160 & 0 & 6 & & 160 (0) & 0 & 160 & 0 \\
A\_2\_5\_3 & 105 & 105 & 0 & 3 & & 105 (0) & 0 & 105 & 0 \\
A\_2\_5\_4 & 105 & 105 & 0 & 6 & & 105 (0) & 0 & 105 & 0 \\
A\_2\_10\_1 & 50 & 50 & 0 & 8 & & 50 (0) & 0 & 50 & 2 \\
A\_2\_10\_2 & 150 & 110 & 26.7 & 18 & & 110 (0) & 26.7 & 110 & 2 \\
A\_2\_10\_3 & 220 & 220 & 0 & 32 & & 220 (0) & 0 & 220 & 5 \\
A\_2\_10\_4 & 150 & 150 & 0 & 15 & & 150 (0) & 0 & 150 & 4 \\
A\_2\_15\_1 & 215 & 215 & 0 & 72 & & 215 (0) & 0 & 215 & 10 \\
A\_2\_15\_2 & 320 & 240 & 25 & 31 & & \textbf{258.3 (8.7)} & 19.3 & \textbf{\emph{275}} & 35 \\
A\_2\_15\_3 & 205 & 205 & 0 & 29 & & 205 (0) & 0 & 205 & 60 \\
A\_2\_15\_4 & 255 & 255 & 0 & 56 & & 255 (0) & 0 & 255 & 3 \\
A\_2\_20\_1 & 255 & 245 & 3.9 & 186 & & \textbf{255 (0)} & 0 & \textbf{\emph{255}} & 80 \\
A\_2\_20\_2 & 270 & \textbf{270} & 0 & 90 & & 265.9 (1.9) & 1.5 & 270 & 90 \\
A\_2\_20\_3 & 260 & 250 & 3.8 & 73 & & \textbf{260 (0)} & 0 & \textbf{\emph{260}} & 10 \\
A\_2\_20\_4 & 380 & \textbf{345} & 9.2 & 86 & & 335 (5.6) & 11.8 & 345 & 200 \\
A\_3\_5\_1 & 205 & 145 & 29.3 & 0 & & 145 (0) & 29.3 & 145 & 0 \\
A\_3\_5\_2 & 115 & 115 & 0 & 1 & & 115 (0) & 0 & 115 & 0 \\
A\_3\_5\_3 & 125 & 125 & 0 & 0 & & 125 (0) & 0 & 125 & 0 \\
A\_3\_5\_4 & 190 & 190 & 0 & 0 & & 190 (0) & 0 & 190 & 0 \\
A\_3\_10\_1 & 205 & 205 & 0 & 3 & & 205 (0) & 0 & 205 & 2 \\
A\_3\_10\_2 & 230 & 200 & 13 & 3 & & \textbf{230 (0)} & 0 & \textbf{\emph{230}} & 3 \\
A\_3\_10\_3 & 305 & 305 & 0 & 3 & & 305 (0) & 0 & 305 & 3 \\
A\_3\_10\_4 & 300 & 300 & 0 & 6 & & 300 (0) & 0 & 300 & 3 \\
A\_3\_15\_1 & 330 & 315 & 4.5 & 67 & & \textbf{330 (0)} & 0 & \textbf{\emph{330}} & 60 \\
A\_3\_15\_2 & 425 & 375 & 11.8 & 51 & & \textbf{392.1 (7.5)} & 7.7 & \textbf{\emph{415}} & 50 \\
A\_3\_15\_3 & 330 & 280 & 15.2 & 48 & & \textbf{291 (5.2)} & 11.8 & \textbf{\emph{305}} & 45 \\
A\_3\_15\_4 & 475 & 390 & 17.9 & 18 & & \textbf{409.8 (11.3)} & 13.7 & \textbf{\emph{425}} & 15 \\
A\_3\_20\_1 & 345 & 290 & 15.9 & 111 & & \textbf{307.2 (10.4)} & 11 & \textbf{\emph{320}} & 100 \\
A\_3\_20\_2 & 415 & 310 & 25.3 & 77 & & \textbf{382.1 (9.8)} & 7.9 & \textbf{\emph{415}} & 70 \\
A\_3\_20\_3 & 360 & 325 & 9.7 & 212 & & \textbf{326 (2.1)} & 9.4 & \textbf{\emph{330}} & 200 \\
A\_3\_20\_4 & 480 & 435 & 9.4 & 38 & & \textbf{453.8 (5.8)} & 5.5 & \textbf{\emph{470}} & 35 \\
A\_4\_5\_1 & 140 & 140 & 0 & 0 & & 140 (0) & 0 & 140 & 0 \\
A\_4\_5\_2 & 150 & 150 & 0 & 0 & & 150 (0) & 0 & 150 & 0 \\
A\_4\_5\_3 & 165 & 165 & 0 & 0 & & 165 (0) & 0 & 165 & 0 \\
A\_4\_5\_4 & 230 & 230 & 0 & 0 & & 230 (0) & 0 & 230 & 0 \\
A\_4\_10\_1 & 310 & 240 & 22.6 & 5 & & \textbf{256.2 (19.4)} & 17.4 & \textbf{\emph{310}} & 5 \\
A\_4\_10\_2 & 370 & 370 & 0 & 2 & & 370 (0) & 0 & 370 & 0 \\
A\_4\_10\_3 & 445 & 350 & 21.3 & 4 & & \textbf{356 (10.7)} & 20 & \textbf{\emph{375}} & 10 \\
A\_4\_10\_4 & 285 & 285 & 0 & 3 & & 285 (0) & 0 & 285 & 3 \\
A\_4\_15\_1 & 545 & 360 & 33.9 & 18 & & \textbf{361.2 (8)} & 33.7 & \textbf{\emph{370}} & 10 \\
A\_4\_15\_2 & 610 & \textbf{455} & 25.4 & 42 & & 451.9 (7.7) & 25.9 & \textbf{\emph{475}} & 200 \\
A\_4\_15\_3 & 450 & 410 & 8.9 & 39 & & \textbf{414.8 (6.3)} & 7.8 & \textbf{\emph{430}} & 40 \\
A\_4\_15\_4 & 515 & \textbf{435} & 15.5 & 38 & & 428.3 (8) & 16.8 & \textbf{\emph{455}} & 200 \\
A\_4\_20\_1 & 585 & 480 & 17.9 & 132 & & \textbf{481 (9)} & 17.8 & \textbf{\emph{520}} & 125 \\
A\_4\_20\_2 & 440 & 385 & 12.5 & 187 & & \textbf{406.9 (8.4)} & 7.5 & \textbf{\emph{425}} & 175 \\
A\_4\_20\_3 & 425 & 300 & 29.4 & 202 & & \textbf{335 (9.7)} & 21.2 & \textbf{\emph{370}} & 200 \\
A\_4\_20\_4 & 500 & 445 & 11 & 90 & & \textbf{460.2 (5.1)} & 8 & \textbf{\emph{465}} & 90 \\
A\_5\_5\_1 & 200 & 200 & 0 & 0 & & 200 (0) & 0 & 200 & 0 \\
A\_5\_5\_2 & 200 & 200 & 0 & 1 & & 200 (0) & 0 & 200 & 0 \\
A\_5\_5\_3 & 220 & 220 & 0 & 1 & & 220 (0) & 0 & 220 & 0 \\
A\_5\_5\_4 & 175 & 175 & 0 & 1 & & 175 (0) & 0 & 175 & 0 \\
A\_5\_10\_1 & 350 & 350 & 0 & 3 & & 350 (0) & 0 & 350 & 0 \\
A\_5\_10\_2 & 345 & 345 & 0 & 2 & & 345 (0) & 0 & 345 & 0 \\
A\_5\_10\_3 & 285 & 270 & 5.3 & 5 & & 270 (0) & 5.3 & 270 & 0 \\
A\_5\_10\_4 & 380 & 380 & 0 & 2 & & 380 (0) & 0 & 380 & 0 \\
A\_5\_15\_1 & 590 & 445 & 24.6 & 61 & & \textbf{446.4 (6.3)} & 24.3 & \textbf{\emph{265}} & 60 \\
A\_5\_15\_2 & 695 & 495 & 28.8 & 50 & & \textbf{530.3 (18.4)} & 23.7 & \textbf{\emph{565}} & 50 \\
A\_5\_15\_3 & 395 & 335 & 15.2 & 52 & & \textbf{346.2 (7.5)} & 12.4 & \textbf{\emph{380}} & 50 \\
A\_5\_15\_4 & 520 & 485 & 6.7 & 77 & & \textbf{486 (12.7)} & 6.5 & \textbf{\emph{500}} & 125 \\
A\_5\_20\_1 & 760 & 635 & 16.4 & 130 & & \textbf{669.7 (9.1)} & 11.9 & \textbf{\emph{690}} & 125 \\
A\_5\_20\_2 & 645 & \textbf{485} & 24.8 & 165 & & 481.7 (13) & 25.3 & \textbf{\emph{515}} & 200 \\
A\_5\_20\_3 & 645 & \textbf{565} & 12.4 & 146 & & 529.1 (9.2) & 18 & 545 & 200 \\
A\_5\_20\_4 & 560 & 485 & 13.4 & 270 & & \textbf{485.9 (10.6)} & 13.2 & \textbf{\emph{505}} & 200 \\
\end{tabularx} % <-- changed
\end{document}
答案1
谷歌建议的代码是
https://github.com/alexmajy/neptunethesis/blob/master/setup/format.tex#L563
确实
\let\tpltable\longtable
\gdef\wuhaobiao{%五号字
\def\tabular{\wuhao\gdef\@halignto{}\@tabular}
\def\endtabular{\endarray $\egroup}
\def\longtable{\wuhao\tpltable}
如果longtable已经定义前\wuhaobiao执行此代码后，在标有then的区域内，longtable将像以前一样工作，但前缀为\wuhao。但是，如果\longtable尚未定义，\longtable则将扩展为 use\tpltable并给出未定义的错误，即使longtable包稍后加载。
所以你需要使用
\usepackage{longtable}
在输入此代码之前。