I can't communicate a subcircuit wiith the main sheet through bus cables
well, thanks to another friend I've noted that the names of the buses in the main sheet where different (LCD screen bus) to the names in the subcircuit, at the main sheet said LCD[1..7] and in the subcircuit sheet said LCD[1..3], other reason is that the wires named RS, RW and E proteus as far as I could read again in the help couldn't be transmitted to the main sheet in the way that the bus cable was drawed by me so I had to modify those names and put names on the taps of the bus cables. Attached are the pictures of how the circuit is working right now.

NOTE: The labels RRSS, RRWW and EE are simply visual aids to me.