Description: The CAD file formats for ACIS, CATIA V4, Elysium Neutral file, Parasolid, and STEP support multiple parts in a single file; and when you import parts from files in any of these formats, Abaqus/CAE imports all of the parts in the file by default. You can now combine all of the parts that you import from a third-party CAD file into a single Abaqus part when you perform your import. If desired, you can also stitch the edges of the imported parts together upon import according to a user-specified stitching tolerance value.

All modules:
    FileImportPart: select file format: Combine into single part and 
    Stitch edges using tolerance options