SOLIDHIST system variable
Function Description:
The SOLIDHIST system variable is used to control whether to keep its history record of original parts for new composite solids.
Type : Integer 
Saved in : Drawing 
Initial value : 0 
Range : 0,1 
When set to be 1, all composite solids created will keep their original parts objects history record. Users could access those part objects for modifying solids.
System Variable Value:
0 : set History Record property set to be none for new solids. It will not keep history record 
1 : set History Record property set to be Record for new solids. Solids will kept their original objects history record.