How to convert all project in ACIS format?

Dear All,

               Is there any way to convert many equipment & piping files in ACIS (AutoCAD solid object) in one command. I have many files in my project, I want to convert all project in ACIS format,is there solution or any option to convert all files in ACIS format. If it is possible please help me.

I am working on Auto plant v8i ss4 & AutoCAD 2012

Thanks in advance.

 Regards,

Shrinivas Jadhav