Hi John, Thank you for your response. I have fixed the problem after doing some trials and errors and asking around. So "646C 2 BYTE x 2 FUEL_annunLOWPRESS_Aft[2]" was confusing to understand because it says byte x 2, so I was entering 2 bytes for each offset 646C and 646D when I was supposed to enter 1 byte for each. Now its working fine as I have configured it correctly with 1 byte each. Regarding the blue annunciators, as they have blue and white states, the offsets file does not seem to have offsets for two different states. For example, "6469 1 BYTE FUEL_annunXFEED_VALVE_OPEN" this cross feed valve annunciator only has one offset while it should have two states as white and blue. Does this mean that PMDG NGx does not support dual states for the blue annunciators?