请教：请大侠帮忙看看这个问题

pimeson

CADENCE导出gds文件时出了3个警告：
translating cellview(PVSS2 layout):
WARNING(347):Failed to get the stream layer rules for the layer-purpose pair '5:252'.All objects on the layer will be dropped.
WARNING(347):Failed to get the stream layer rules for the layer-purpose pair '7:252'.All objects on the layer will be dropped.
translating cellview(PVDD2 layout):
WARNING(347):Failed to get the stream layer rules for the layer-purpose pair '6:252'.All objects on the layer will be dropped.
请问这些是什么意思，对版图有什么影响么？