The information in this article applies to:

• SONAR 4

SONAR 4 can load SONAR 1.x, SONAR 2.x and SONAR 3.x projects, but projects that are saved in SONAR 4 cannot be re-opened in SONAR 1.x or SONAR 2.x. In case you need to open a pre-SONAR 4 project in an earlier version of SONAR, it is recommended that you always create a backup copy of the original project before you re-save the project in SONAR 4.