Thanks for your help, As my knowledge of forscan is almost 1 day old I appreciate your support and excuse my lack of understanding. ... I did not figure out which digit I need to change the Line 720-02-01 has FBA4 AC78 1E08, your charts say 3 disable and 7 enable , next Column says : Add Hex 4 to Existing Value: 3+4=7. But there is no 3 in all line. attached screen shot.