Having never used BricsCAD, it appears that:
ACIS solids (.SAT) CAN be imported, by typing the ACISIN command, (without communicator.) (???)
Please see the next two links:
https://forum.bricsys.com/discussion/23380/acis-import-and-export-no-longer-supported-under-v14-without-communicator (FALSE)


https://forum.bricsys.com/discussion/18131/supported-import-format
.....Bricscad can also import/export ACIS solids (.SAT) via the ACISIN and ACISOUT commands. There are also third part opti.....


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A free manual:
https://www.bricsys.com/bricscad/docs/en_INTL/V18/BricsCAD-V18-for-AutoCAD-Users.pdf (Page153-156)


- Brian

SYCODE had an import addin for versions 8,9,10, but was acquired by 3DSystems, (and seems to have disappeared?)