The solids contained in Solidworks assemblies (files with a .sldasm extension) can be imported if
You have the .sldasm file and all of the referenced .sldprt files.
Files written with SolidWorks 2002 or earlier requires that you have a copy of SolidWorks on the same computer on which FeatureCAM is installed. Solidworks is run automatically by FeatureCAM to extract the solids and send them to FeatureCAM. Files written with Solidworks 2003 or a later version do not require you to have a resident copy of SolidWorks.
Each solid of the assembly is loaded into a single FeatureCAM document.
See also Importing Solidworks files, Color in Solidworks and .x_t files, and Importing_other_CAD_files