AC 12
MECH12
I did a search but didn't find a similiar problem.
I tried the General Autocad forum. Got lots of help but no solution. Since I'm running mech I thought I would try here

I want to "insert" an updated block into a dwg that already has that block name in it.
When I insert the new block autocad never asks if I want to redefine it. Autocad allows me to insert the new block, but the new block gets changed into the old block.
Is there a system variable that sets this type of action or a mech setting? There are two other drafters that get asked when the try to redefine a block.
expert set to 0.
There are no error messages.
Thanks