If you are using a version older than the "Save As" window allows, you must use a neutral file format to "convert" the file.
: Sites like Onshape can often open newer SOLIDWORKS files and export them to a STEP format that your older version can read. solidworks future version file converter link
: After opening a neutral file in an older version, it will appear as a "Dumb Solid" (a single imported body). Use the FeatureWorks add-in ( Insert > FeatureWorks > Recognize Feature ) to attempt to rebuild the parametric design tree. 4. Alternative Tools and Converters If you are using a version older than
The most direct way to open future version files without third-party tools is through SOLIDWORKS' built-in interoperability. Use the FeatureWorks add-in ( Insert > FeatureWorks
If you do not have access to the newer version of SOLIDWORKS to perform a "Save As," consider these alternatives:
: Request the file in Parasolid (*.x_t) , STEP (*.stp) , or IGES . Parasolid is often preferred as it is the native kernel for SOLIDWORKS.