Seems like a lot of excessive jumping through hoops when the original 3D program should be able to export a usable dxf file to open in Autocad. I sometimes have to deal with this issue when moving from one program that utilizes a "Y" axis up work environment to another program that uses a "Z" axis up work environment. Usually you just change the setting in the Export options and it provides a seamless transition between the two programs. Not sure why it isn't working the same way with this Risa 3D program?