Unable to Create Edge Flange

Has anyone seen this?  We recently upgraded to SW2013 and more recently to SP3.0.  The attached image is just a sample part I drew up for this post.  It seems to be consistantly throwing an error whenever I create the second flange.  Then I close the part and re-open it and it works fine.  Just a simple 90 degree flange.

Thanks.

SolidworksSheet Metal