Calibre LVS不过

用ICC做了一个设计 将gds导入cadence后用calibre做lvs首先将所有端口的dg层改到pn层 另外在电源环上打上label （对应metal的pn层）
lvs报告：
CELL COMPARISON RESULTS ( TOP LEVEL )

##########################
# ###
##NOT COMPARED#
# ###
##########################

Error:Power net missing in layout. Ground net missing in layout.
LAYOUT CELL NAME:bchDec_Top_fill
SOURCE CELL NAME:bchDec_Top
--------------------------------------------------------------------------------------------------------------
INITIAL NUMBERS OF OBJECTS
--------------------------
LayoutSourceComponent Type
--------------------------
Ports:135136*
Nets:456146457243*
Instances:823835804969*MN (4 pins)
489676468421*MP (4 pins)
876876D (2 pins)
------------
Total Inst:13143871274266

NUMBERS OF OBJECTS AFTER TRANSFORMATION
---------------------------------------
LayoutSourceComponent Type
--------------------------
Ports:135135
Nets:302513302527*
Instances:347467346913*MN (4 pins)
1517814624*MP (4 pins)
497497D (2 pins)
0560*INV (2 pins)
0431*SPDW_2_1 (4 pins)
0224*SPDW_2_1_1 (5 pins)
02583*SPDW_2_2 (5 pins)
01*SPDW_2_2_1 (6 pins)
027*SPDW_2_2_2 (7 pins)
017*SPDW_3_1 (5 pins)
03*SPDW_3_2 (6 pins)
0278*SPUP_2_1 (4 pins)
049*SPUP_2_1_1 (5 pins)
03084*SPUP_2_2 (5 pins)
0224*SPUP_2_2_1 (6 pins)
0149*SPUP_2_2_2 (7 pins)
096*SPUP_3_1 (5 pins)
0160*SPUP_3_2 (6 pins)
276276SMN2 (4 pins)
…………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………
又使用hcell automatch的方式做了一次，报告如下
OVERALL COMPARISON RESULTS

#######################
# ###
##INCORRECT#
# ###
#######################

Error:Power or ground net missing.
Error:Connectivity errors.
Error:Property errors.
Warning:Ambiguity points were found and resolved arbitrarily.
Warning:LVS property resolution maximum exceeded.

**************************************************************************************************************
CELLSUMMARY
**************************************************************************************************************
ResultLayoutSource
------------------------------------
CORRECTADDHXLADDHXL
CORRECTAND2X1AND2X1
CORRECTAND2X2AND2X2
INCORRECTAND2X4AND2X4
CORRECTAND2XLAND2XL
CORRECTAND3X1AND3X1
INCORRECTAND3X2AND3X2
CORRECTAND3XLAND3XL
CORRECTAND4X1AND4X1
NOT COMPAREDAOI211X1AOI211X1
NOT COMPAREDAOI211X2AOI211X2
NOT COMPAREDAOI211XLAOI211XL
NOT COMPAREDAOI21X1AOI21X1
NOT COMPAREDAOI21XLAOI21XL
NOT COMPAREDAOI221XLAOI221XL
NOT COMPAREDAOI222XLAOI222XL
NOT COMPAREDAOI22XLAOI22XL
NOT COMPAREDAOI31X1AOI31X1
NOT COMPAREDAOI31XLAOI31XL
NOT COMPAREDAOI32X1AOI32X1
NOT COMPAREDAOI32X4AOI32X4
NOT COMPAREDAOI32XLAOI32XL
CORRECTBUFX1BUFX1
INCORRECTBUFX12BUFX12
INCORRECTBUFX16BUFX16
CORRECTBUFX2BUFX2
INCORRECTBUFX20BUFX20
CORRECTBUFX3BUFX3
CORRECTBUFX4BUFX4

发现有一些Power net missing in layout. Ground net missing in layout问题的cell，如下

CELL COMPARISON RESULTS

##########################
# ###
##NOT COMPARED#
# ###
##########################

Error:Power net missing in layout. Ground net missing in layout.
LAYOUT CELL NAME:AOI211X1
SOURCE CELL NAME:AOI211X1
--------------------------------------------------------------------------------------------------------------
INITIAL NUMBERS OF OBJECTS
--------------------------
LayoutSourceComponent Type
--------------------------
Ports:77
Nets:1010
Instances:44MN (4 pins)
44MP (4 pins)
------------
Total Inst:88

NUMBERS OF OBJECTS AFTER TRANSFORMATION
---------------------------------------
LayoutSourceComponent Type
--------------------------
Ports:77
Nets:77
Instances:22MN (4 pins)
01*SPUP_2_1_1 (5 pins)
10*SPMP_2_1_1 (6 pins)
11_smn2v (4 pins)
------------
Total Inst:44

* = Number of objects in layout different from number in source.

但这种错误只是少部分cell存在，像
AOI*之类的，其他cell都没有这种问题，这个库也是没问题的（很多人用过）
，而且我到ICC和cadence里面都查看过相关类型cell的电源地连接，没有问题
不知道是我电源地的label没弄对还是什么问题啊

我也遇到了这样的问题，你解决了吗?

lvs spice override global yes试试，
source里面vdd，vss是global的么

1.检查P/G text,是否正确打到相应的metal layer 上了。2.Text 要打到top 的顶层。
3.Check LVS comand file ,确认command file 里面定义识别text layer的层次是metal layer 还是text layer.
4.P/G 不对必然会导致很多管子提取不出来。
5.建议用hcell 和edtext file去run LVS,容易debug.

lvs 通常需要经验的积累， 否则就是看天书

这种一般电源的问题比较大，短路或者错误的global power/gnd 都容易出现上述现象