LaTeX报错：Command ewfloat already defined

LaTeX运行时出现错误：

! LaTeX Error: Command c@lofdepth already defined.
               Or name end... illegal, see p.192 of the manual.

问题原因：memoir宏包与subfigure宏包冲突。 

解决办法：在subfigure宏包前加入以下代码

makeatletter
letc@lofdepth
elax
letc@lotdepth
elax
makeatother
usepackage{subfigure}