Copy and Paste from AutoCAD version 13 into the DGN MicroStation V8i.

When trying to Copy and Paste an AutoCAD Block version 13 (cell) from a DWG file using the commands CTRL+C and CTRL+V or Edit > Copy and Edit > Paste,

the Block will not paste into the DGN MicroStation V8i. With two sessions open;

In the DWG, the Block is selected, then copied (Edit > Copy)
Moving the mouse into the DGN file, select Edit > Paste
The Block can be seen on the end of the mouse cursor
When clicking to accept the Paste command, the Block disappears and does not paste into the DGN