ADS中EM仿真

[upload=1]我在CADENCE中导出PCB信号线（ADS文件）后，在ADS LAYOUT界面导入ALLEGRO文件后出现WARNING：如下：
[upload=1][upload=1][upload=1][upload=1][upload=1]some of the layers that need to[upload=1] have layer bindings removed are defined in these read-only libraries:ads_standard_layers
these libraries will not be change
后面进行EM仿真却出现错误：
Analysis "Solve" (M111220204403) of design PCI_AD0_lib:PCI_AD0:layout failed.（其中PCI_AD0是从ALLEGRO重摄取的信号线）
请问这是什么原因导致的