Newbie- loosing features of my solids x2

[chaz6966]

ive drawn to different solid models . basically a solid rectangle with a tapered boss boleen added to the parting line, and a drafted pocket bollen removed from a different spot on the block.
im using these for practice toolpaths.
when i go to close the drawing it says( some solids need regenerated) or some thing like that.( i clicked regen) and when i reopen them some of the surfaces are missing , and it says something like operator cannot be completed. and i have to click on this box 4 or 5 times till it goes away.
sorry i forgot the actual "wording" of the error. at my 2nd job now where i can get online.

too different drawings/files at different times. both done the same thing.
is there updates or anything i need for x2
thanks.

[Superman]

What has happened is, the geometry that is used to create the solid has been altered, go to the "solid" tab on the op manager and regen all. You can also "adjust the solid thru this area.

If having a "history" of the solid is not important, then run a chook call "NoHist.dll".
this removes any association with wireframe entities on the solid you select when running thru the chook.