Well! Ok, I'll go back to copy. But not happily. One problem with my function was that it does not carry dimension overrides. And all of the dire possibilities abovementioned. I have to say, all the heavy breathing and (to me) advanced discussion point up the fact that what we have is a bug. One that Autodesk ought to have fixed long since. If COPY breaks a leader then either fix COPY or fix Leader. I ain't dead yet, I'm gonna try recreating the leader through the (command) function. Slow and unsophisticated but not likely to get me in trouble with the database structure. Thanks for the comments! rs