04.10.2017 - 01:36 [Наиболее поддерживаемое сообщение]
You have to convert the project before sending it to your partner, and because you need to go from 2017 to 2012, you will make the conversion in 2 steps.
The conversion tool is in Allmenu, in the menu "File".
The best procedure is to copy and paste the project from Allplan folder to any folder in your computer.
Then, convert it to Allplan 2014. To get your project in version 2012, you have to install Allplan 2014 or 2015 and make another conversion to Allplan 2012.