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Why doesn't LVS check diode in schematic?

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ngocthao

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My CDL Netlist:

.subckt diode A
D0 A GND DW area=20
R0 VDD GND 1k $[NR]
XI5 GND VDD inv
.ends diode

When I run LVS and result as



***************************************************
******** DEVICE MATCHING SUMMARY BY TYPE ********
***************************************************

TYPE SUB-TYPE TOTAL DEVICE UN-MATCHED DEVICE
SCH. LAY. SCH. LAY.

MOS P 1 1 1 1
MOS N 1 1 1 1
RES NR 1 1 1 1
DIO DW 0 1 0 1

***************************************************
**/W* -- SCHEMATIC AND LAYOUT MAY NOT MATCH **
** CHECK ALL ABOVE DISCREPANCY **
** AND WARNING MESSAGES **
***************************************************

I don't know why DIO DW at SCH = 0.
Because this is the first time I layout and runlvs diode so
please help me. Thanks
 

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