I have created a project in Vivado 2015.1.
When trying to open this project in Vivado 2014.4(1), I get the following message.
This is expected behavior.
However, after pressing OK, nothing happens.
The project is not opened.
The project should open in a read-only mode and give the following message:Vivado 2015.1 has been fixed to be able to open future versions of Vivado.
In most cases it will not be possible to open a Vivado 2015.1 or later project in Vivado 2014.4, you will need to recreate the project in Vivado 2014.4 if you wish to use Vivado 2014.4.
Note: the write_project_tcl command can be used to generate a Tcl script to easily recreate the project.