error: Layer 'tb_conn' must be connected.
drc(tb_conn (sep < 4.0 ) diffNet "TB.c N-well spacing with different potential must be >=4.0um")
error: Layer 'tb_conn' must be connected.
drc(tb_conn (sep < 1.4 ) diffNet "TB.d N-well spacing with same potential must be >= 1.4 um")
Errors exist in the rules file "/home/1/st02/divaDRC.rul".,这错误怎么修改呢,跪求高手解答,不胜感激……