as below, it's showing error for 4 bends, THK<10mm.
If do 3 bends first, no error.
Win 7 Pro, SW2010 SP4, HP-Z600 Workstation.
Sorry, use SW2011 SP2
I'm seeing the same! That's gotta be a bug.
However, doing a Ctrl Q does allow the part to be flattened.
I wouldn't be surprised at all if this was a bug...but it could be something to do with your radius/thickness/bendallowance/etc...
Can you do a print screen of your sheet metal feature properties and base-flange as well?
Try setting your radius to somewhere around 1/8" (altough it does seem like you have a proper radius) and your bend allowance to k-factor...and your k-factor value to 0.5...see if that still happens...
Retrieving data ...