ADS updata layout 报错

朋友好！
用ADS生成版图时候，点击Generate/Updata layout之后，报错：
ERROR: (dedsedlg.ael line 1487, column 25 in de_ensure_other_design_sync_context_exists)
Cannot get equivalent design for synchronizing "MyLibrary_libA_SIFilter1_DA_Filter_0:schematic":: Library "MyLibrary_lib" has layout layers defined, but the units and resolution are not defined. Please use the Technology Dialog to complete the layout technology before creating a layout or substrate.
请问下什么原因呢?谢谢！

看起来像没有定义PCB叠层结构

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