BLOCKREPLACE not working (2016 & 2018)

[leilani.gnall-gregory]

please see attached file.  i have 2 blocks, both are dynamic, one also has visibilities.  i can't get "blockreplace" command to work on them.  trying to replace one with the other.  tried replacing in both directions.  also tried removing visibilities from block , and it still didn't work.  any one know why its not working? tried it in both autocad 2016 & 2018, no luck.

[h_s_walker]

Have you tried using designcenter to REDEFINE the block you're trying to replace?

[pendean]

BLOCKREPLACE has never worked on DYNBLOCKS: try the other tip noted with DesignCenter, or INSERT your problem file into a template file with all the correct blocks then SAVEAS... .

[leilani.gnall-gregory]

"redefining" might have worked, if there weren't already instances of BOTH blocks in my drawing.  Unfortunately, you cannot "rename" a block to an existing name, and so I wind up with a catch 22 of either having 2 identical blocks with different names, or having to start over.  or just seeking out all the instances left and replacing individually. 

lose-lose.  

[leilani.gnall-gregory]

"BLOCKREPLACE has never worked on DYNBLOCKS"... that's unfortunate since nearly every block I make has at least one dynamic feature.  hard to digest that this feature has not been improved.