function inv100_PutItemToCompatSlot takes unit u, item it returns integer
    local integer i = 0
    local integer compat = 0
    local integer bestcompat = 'zzzz' //any constant value that must be greater than "maxclasses"
    local integer bestslot = 0
    local integer slots = get_object_iparam(u, "inv100_rows") * get_object_iparam(u, "inv100_cols")
    local integer breakcycle = 0
    call set_session_iparam("skip",1)
    if GetItemTypeId(it) == 0 or IsItemPowerup(it) then
        return
    endif