Deleted / Missing solids after save
I have encountered a problem with BricsCAD V18 MAC (30 day trial). I will spend time drafting solids, I will save my work frequently and also on exiting the session. Then later when I return to the file some of the objects / solids I have made are missing either in part or whole solid objects. The objects are not overly complex, but they are comprised of unions of solids as well as chamfers / fillets ect. The loss of these objects is not always chronological. For example I will make objects "A", "B", & "C" in that order. Object "B" might go missing but objects "A" & "C" remain, as well as the 2D construction lines that I made to create object "B". What is going on? I am looking at buying this program, but if this is a frequent occurrence I will look elsewhere. Is there a polygon limit? Or do I need to save in a particular version?