Fatal 102 (ICI) - Module mode conflicts with command.Edit wil occur only in the sheet.
While trying to edit the Tunable specs online from Control logic documents(CLD) , system throws up the a informational message(Fatal 102 (ICI) - Module mode conflicts with command.Edit will occur only in the sheet.)
Also the observation is that , i tried to do the same for other node/controller for which there is no issue.
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Do an status report of the affected module to se if there is issues with memory, have seen this issue before when there had been module errors present.
Also perform an configuration verification to be sure that the function blocks you are trying to modify is currently present in the module.