Help: Altera DE2 Board

Cris72: Yes, there is an unassigned pin in my system for SRAM, address pin number 18. For DE2 Board, the number of address pin is 18 in total, from 17downto0. But in my TCL file for SRAM, i set the number of address input to 18, as in attachment, but the SOPC generates it to be 19 pins, from 18downto0, 1 pin extra after generation. so pin 18 is left unassigned. i am not sure why SOPC generates 19 pins. is it because of my TCL file?

AndrewS6: Yes, i already set all unused pins to inputs tri-stated.

P/S: I think there is sth wrong with my TCL file for SRAM (attachment). can someone help me to check if everything in TCL is similar to the Pin Table for SRAM as in attachment previous post in this thread. thanks!