87. LaTeX技巧570：“! LaTeX source files more than 5 years old!.”解决方案

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近期有网友频繁遇到这个问题，代码没有问题，而却会报错如下：

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! You are attempting to make a LaTeX format from a source file
! That is more than five years old.
!
! If you enter to scroll past this message then the format
! will be built, but please consider obtaining newer source files
! before continuing to build LaTeX.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

! LaTeX source files more than 5 years old!.

解决方案如下：

• 将时间改到5年前，再编译，一切OK。
• 但改系统时间是很不爽的一件事情。可以使用如下的解决办法：

1. 打开\MiKTeX\tex\latex\base\latex.ltx文件
2. 找到“\ifnum\count@>65” 然后修改为“\ifnum\count@>100” (or some number larger than 100)
3. 保存文件

注意：真正的问题并没有修正，只是保证代码可以编译罢了

最好的方案 还是建议大家安装新版系统即可！

选自：

http://www.duxiaoyu.com/?cat=15

http://www.cl-projects.de/projects/misc/latex-debian-etch.phtml

http://tex.stackexchange.com/questions/24762/latex-sourcefiles-older-than-5-years-old-xelatex-fails