菜鸟求助encounter中出现的问题

（1）用foundry给的LEF，出现类似如下warning：
Loading Lef file ../LEF/head_CZ6H_4AL.lef...
WARNING (LEFPARS-2020): FOREIGN statement in VIA is obsolete in version 5.6 and later.
这个warning要如何去掉啊
（2）checkDesign时出现
**WARN: (SOCDB-2139):
Input netlist has a cell QB50080MWC which is marked dont_use in the library.
其中QB50080MWC是一个IO PAD。请问dont_use是在哪marked的啊，这个warning有影响吗?


知道问题很水，望指点啊

大神们指点下菜鸟啊