就是这个错误啊，帮看看啊

Log: Module driver

Filter: <No filter>

Responsible user: 123
Generate module driver for 456_Prj\SIMATIC 400(1)\CPU 414-3 DP\S7 Program(1)\ of 10/12/2011 20:31:52.
E: Necessary files are missing for block CH_AI. Please note that you have to install exactly the same version of the library as the one this block was imported from..
>>>Due to the previous error(s), creation of module drivers was aborted<<<