icc_shell> place_opt为什么Horizontal resistance value is 0

icc_shell> place_opt
Information: Library Derived Cap for layer A1 : 0.00017 0.00016 (RCEX-011)
Information: Library Derived Res for layer A1 : 0 0 (RCEX-011)
Information: Library Derived Cap for layer A2 : 0.00019 0.00018 (RCEX-011)
Information: Library Derived Res for layer A2 : 0 0 (RCEX-011)
Information: Library Derived Cap for layer A3 : 0.0002 0.00021 (RCEX-011)
Information: Library Derived Res for layer A3 : 0 0 (RCEX-011)
Information: Library Derived Horizontal Cap : 0.00019 0.00019 (RCEX-011)
Information: Library Derived Horizontal Res : 0 0 (RCEX-011)
Information: Library Derived Vertical Cap : 0.00019 0.00018 (RCEX-011)
Information: Library Derived Vertical Res : 0 0 (RCEX-011)
Information: Using derived R and C coefficients. (RCEX-008)
Information: Using region-based R and C coefficients. (RCEX-013)
Information: Library Derived Via Res : 0.01 3e-09 (RCEX-011)
Error: Horizontal resistance value is invalid: 0 (PSYN-562)
Error: Vertical resistance value is invalid: 0 (PSYN-562)
Severe Error: Fatal error: Placer did not complete. (PSYN-375)
但是我check时是如下报告:为什么显示Resistance 不是0.请指教我哪里出错了?map是自己写的,是不是map写错了?但是为什么报错有电容没电阻呢?谢谢了!
check_physical_constraints
Physical Library: /home/user0/mywork/myadder/myadder_lib
Routing layer : A1 width: 600 pitch: 1800 space: 600
Routing Layer : A1 Resistance : 8e-05 Capacitance : 2.9e-05
Routing layer : A2 width: 700 pitch: 1800 space: 650
Routing Layer : A2 Resistance : 8e-05 Capacitance : 2.03e-05
Routing layer : A3 width: 800 pitch: 1800 space: 800
Routing Layer : A3 Resistance : 5e-05 Capacitance : 2.9e-05