I have been sent an AuotCAD file that Draftsight opens up but it is just full of place holders: Maps Container (Map_Solids) and AecbDbLabelCurve (AecbBldSrv80)

Any way to make Draftsight able to read these? Or is there a version of AutoCAD that I can ask the author of the files to use that Draftsight will be compatible with?