This has been known to affect customers exporting PCB boards to ECAD file format in SolidWorks 2015. The application crashes when clicking 'Finish' in the Export Wizard.
It is currently marked as a critical SPR. A workaround exists but is specific to the geometry of the board.
This SPR has been resolved in the 2016 SP2 and newer versions of SOLIDWORKS/CircuitWorks.