# Multiple version support

You can use the current release of FactoryTalk View Studio to create ME runtime application files (*.mer) that will run on previous versions of ME Station. These choices are available in the Create Runtime Application dialog box.

## Open applications

Opening an application that was created with an earlier version of FactoryTalk View Studio or RSView Studio will convert the application to the current version of FactoryTalk View Studio. Once the application has been converted, it cannot be opened by earlier versions of FactoryTalk View Studio or RSView Studio. However, you still have the option of creating runtime application files that will run on earlier versions of ME Station.

## Import applications

When you import earlier version application files, FactoryTalk View creates a copy of the application for the current version of FactoryTalk View. The earlier version is not altered.

You cannot import applications to FactoryTalk View Studio that were created with later versions than the one they are presently running.

Tip: | When a run-time file for an earlier version is created, the test run behavior on the current version of FactoryTalk View Studio may not be the same as actual run-time behavior on the targeted release.

## See also

Open applications

Import and conversion of an application

Create a runtime application