icc导出的gds文件不分层

现微电子专业大四，想要了解下后端流程
自己操作的时候中间省掉了优化步骤，想最后导出gds文件看看

学习时参考（视频PPT）数字IC后端设计技术全局观：从RTL到GDS视频中的脚本
自己操作的时候省掉了中间优化的步骤，想导出gds文件看看，结果都显示在同一层
参考了ICC如何正确导出gds文件
最后不知道该怎么修改了

下面是 report_set_write_stream_options

Layer mapping file name: ./smic065/TF/TF_Cds/SmicDR15R_VTTF_0065_LG_V1.10_0R/SmicDR15R_VTMP_0065_LG_V1.10_0R.map

Double pattern map file: (null)

Rename cell file name: (null)

Child cell depth: 20

Skip reference lib cells: false

Text height width ratio: 1.000000

Text width: 0.000000

Flatten contact: false

Flatten contact array: false

Contact prefix: $$

Output notch: false

Output gap: false

Output fill: true

Output outdated fill: true

Output instance name as property: false

Output geometry property: false

Strip backslash from instance net names: false

Long name length: 255

Keep data type: true

By layer number:

Output compressed OASIS: false

Output compressed GDSII: false

Output pin as text: true

Output pin as geometry: true

Pin name magnitude: 1.000000

Net name magnitude: 1.000000

Rotate pin text by access direction: false

Output net as text: false

Output net as property: 1

Output net as plex: false

Output odd pin: false

Design intent struct name: (null)

Critical name list: (null)

Design intent layer mapping: (null)

With original data: true

Output design intent data: false

Rename multiple LEF foreign cell names: false

求指导。不过不能连工作站了，暂时也不能验证