Do you have any idea why I can’t save the file after completing a number of operations:  I launched OP 66 and saved it, everything is fine. Launched OP 67 then gives error.
Closed the file.
I launched OP 67 and saved it, everything is fine. Once OP 66 was launched, it still gives the same error.

I have done save as , import/export 3dxml , check representation.

There is some limits for number operations into features BHV?
 

Thanks in advance