You can open SolidWorks parts and assemblies using Service Pack 5 of the previous release.
From SolidWorks 2012 on, you can open a future version file in Service Pack 5. For example, in SolidWorks 2012 Service Pack 5, you can open SolidWorks 2013 files. Interoperability is only supported between consecutive releases. For example, you cannot open a SolidWorks 2014 file in SolidWorks 2012 Service Pack 5.
Future version files appear in read-only mode when opened in the previous release and have reduced functionality. The FeatureManager design tree contains limited data.

Any actions that require FeatureManager design tree data cannot be performed with a future version file open in the previous release Service Pack 5. However, once you upgrade to the next version of SolidWorks, all the FeatureManager design tree data is available.
With a SolidWorks part or assembly open in Service Pack 5 of the previous release you can:
- View configurations.
- Use the Measure tool.
- View Mass Properties and Custom Properties.
- View Materials.
You cannot edit future version SolidWorks parts or assemblies in Service Pack 5 of the previous release. However, you can use future version parts and assemblies in drawings and assemblies of Service Pack 5 of the previous release.