At present scenario,

The conversion of minor to major account at CIF level could not be possible as the option is not enabled in CMRC Menu. 

A temporary solution to be followed by our staff at field level is much useful and shared below for informationqqqqqq
  • Invoke CMRC menu in DOP Finacle
  • Enter CIF ID of the customer who become major.
  • Click on GO button (F4)
  • PROCESSING pop up window loaded twice in the bottom right of DOP Finacle Window.
  • Please note carefully that close the second PROCESSING pop-up window by clicking close button of the pop up window. (don't close the first PROCESSING popup window)
  • Now everything loaded and enabled the option for changing Minor to Major as usual.
This is an temporary option and permanent solution will be provided by Infosys Team.