Thanks for the response, but I received a few errors message when I opened that file.
I think I found a solution. After a CHANGE command you have to create a new material property for the braces. You can then assign this material property to braces. For the supports, you have to add supports to all nodes that at some point will have supports applied to them (for expected strength load case apply lateral supports to nodes, but then for dead load case these same nodes need supports too, but the supports would be completely released ie fixed but fx fy fz mx my mz).
I think I found a solution. After a CHANGE command you have to create a new material property for the braces. You can then assign this material property to braces. For the supports, you have to add supports to all nodes that at some point will have supports applied to them (for expected strength load case apply lateral supports to nodes, but then for dead load case these same nodes need supports too, but the supports would be completely released ie fixed but fx fy fz mx my mz).