Labview version 5.1.1 I can't edit anything on block diagram or even save file. When I try I get "oheapmgr.c L 60" error I can highlight everything visible except the while loop with the arrow, but I can't move, resize, or even clear it. If I click on While Loop it goes strait to error. After reading other Q&A my guess is I moved while loop while resizing. If I can't change anything how do I fix it.