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LEF generated with non-used layer info

RuihW

Hello,

I created an abstract view of an inverter using the integrated Abstract Generator. The abstract view looks fine. However, when I used File->Export->LEF, it created an LEF with layers that were not used in the layout.

The inverter layout only uses METAL 1. But in LEF, I see non related vias such as M3_M2.

VIA M3_M2s
LAYER VIA23 ;
RECT -0.13 -0.13 0.13 0.13 ;
LAYER METAL3 ;
RECT -0.19 -0.19 0.19 0.19 ;
LAYER METAL2 ;
RECT -0.19 -0.19 0.19 0.19 ;
END M3_M2s

The log also shows warnings about other vias. Did I miss any steps?

WARNING: (OALEFDEF-50039): VIA M1_NPOLY1s: The via uses more than three layers. This via was ignored. Ensure that the vias are correctly defined.
WARNING: (OALEFDEF-50039): VIA M1_PPOLY1s: The via uses more than three layers. This via was ignored. Ensure that the vias are correctly defined.
WARNING: (OALEFDEF-50039): VIA M1_NACTIVEs: The via uses more than three layers. This via was ignored. Ensure that the vias are correctly defined.
WARNING: (OALEFDEF-50039): VIA M1_PACTIVEs: The via uses more than three layers. This via was ignored. Ensure that the vias are correctly defined.
WARNING: (OALEFDEF-50039): VIA M1_SUBs: The via uses more than three layers. This via was ignored. Ensure that the vias are correctly defined.
WARNING: (OALEFDEF-50039): VIA M1_NWELLs: The via uses more than three layers. This via was ignored. Ensure that the vias are correctly defined.

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