I've tried pickadd, pickauto, pickfirst, highlight, clear selection set lisps, cycle on/off I don't have multiple drawings open.
I have ACAD 05 and my object selection is acting up. i can't select certain objects at random times. if i envoke any command first i can pick them but i am so used to selecting and then doing the command.
it works fine sometimes and then other times it just stops working. i don't have to exit the drawing to get it to work but this is slowing me down. (it is any file i open and other users aren't having this problem with those files)
i see others have had this problem but i haven't found a solution that works yet.