Do you have new LCDI2C4BIT Library?

Using Arduino Displays
2

You can get the 'New' LiquidCrystal Library, by fm, at https://bitbucket.org/fmalpartida/new-liquidcrystal/wiki/Home

This replaces LiquidCrystal and LiquidCrystal_I2C in a single library (plus adds support for Shift Register expanders).

You'll need to determine the mapping of your I2C interface and set up the correct constructor though.