Revit Options - HOW copy/paste elements from DO1 to DO 2

[panizBMS2M]

I already have 2 design options, and I want to copy some walls from design option 1 to 2, but when I click  on "add to set", is shows me this error! Any idea how I can copy some elements between DOs?

[barthbradley]

Why don't you Clipboard Copy and Paste Aligned to Same Place between DOs?  Not use Add to Set.    

[panizBMS2M]

Because after doing that, I still can't copy or add it to the other DO! 

[barthbradley · Accepted solution]

Is the DO you are pasting into open in editing mode?   

[panizBMS2M]

YOU ARE A GENUES! Thank you so much!