I am trying to replace blocks without attributes with new blocks with attributes. 1. I have tried redefining the blocks - the attribute order got messed up in the redefined block 2. I tried making new blocks with new names and using the block replace express tool Both of those methods created some sort of nested block that would bring up the refedit dialog box when doubleclicked.... I vaguely remember an undocumented command line version: -block<name1>=<name2> I don't recall the proper syntax, (is name1 or name2 the new block, and where should the blocks be located?) when trying this conmmand with two existing blocks I got the message "invalid block name". TIA