i dunno if it to do with RTAB or the MAKER but how do you make it so the...

i dunno if it to do with RTAB or the MAKER but how do you make it so that when you are on the menu EQUIP screen
and are removing stuff you can change the weapon but not remove it EG
WEAPONS AVAILABLE= BRONZE SWORD SILVER SWORD
WEAPONS EQUIPED = WOODEN BAT
you cannot remove the wooden bat but can equip one of the swords THEN if you equip the bronze sword you cannot remove it you can only change it to the other sword or the bat

ALSO CAN ANYBOSY TELL MY WHY IT DOES THIS!!!
when ever i go into battle with whatever battle system it says
RONG NUMBER OF ARGUMENT (1 for 2)

i dunno if it to do with RTAB or the MAKER but how do you make it so that when you are on the menu EQUIP screen
and are removing stuff you can change the weapon but not remove it EG
WEAPONS AVAILABLE= BRONZE SWORD SILVER SWORD
WEAPONS EQUIPED = WOODEN BAT
you cannot remove the wooden bat but can equip one of the swords THEN if you equip the bronze sword you cannot remove it you can only change it to the other sword or the bat

What maker are you using? I use RMXP and it works perfectly unequipping things, I dunno how the others work though, 
maybe if you make a weapon with name "Empty", no graphics or description you can equip it to simulate you have nothing. Hope it works. 

im usin rmxp i want to know how to make it so that you CAN'T have no weapon equipped you have to have 1