Mitsubishi GX Developer eRROR

[Zubair Ahmed]

EVERY TIME when i change my ladder logic program then this message appears .. what is this mean

[Gambit]

You are are in the online mode. Press F2 for Read mode

[Zubair Ahmed]

i have pressed f2 but problem still exists

[JRoss]

At some point in the past you must have gone into Online Monitor/Write mode to make online changes. This sets an option to write changes to the PLC after compiling. Go to Tools/Options and look for that setting.