AME仿真中问题

myhotsky

谁能帮我看一下，在AME建模中出现下面这个提示是什么错误呀
" M9 M9 o" o7 P- q! ~, k$ X/ z- For free edition of Microsoft Developer Studio, you may need to set the MSSDK environment variable to the installation directory of your MS Windows SDK
; h7 B* N+ g4 ISystem build error!