I have posted this yesterday in the general AutoCAD group, but was advised to post it here, so there is the problem: I have drawings which content one block with one attribute in it, and this block is copied many times. The only attribute in this block is 5 digit number. Is it possible to find a tool which is doing the same work as the one in Express Tools (Automatic Text Numbering) but for block like described above? Also when the work is done manually is it possible to check this practicular attribute for value repetitions (it should not repeat, but mistakes can happen). So far I made routine, which is doing it without a list - in the moment you click on the attribute it giving him a number, then you click the next -it giving the next number etc. In the beginning you are giving starting number and increment. The problem which killing this routine is that if you by mistake make click at non-attribute object or on empty space, this brakes the operation and you have to start again from the point the wrong click happen. I will like to create a list first and then renumber all blocks at once in order they was selected, but for now I can't make it work with attributes. It seems my Lisp knowledge is not good enough to handle this problem. Thanks John