protel99se 中，原理图绘制完成后生成pcb时为什么出现错误node not found 是什么原因

Answer 1

原因是你PCB封装库中找不到你原理图中出现的器件封装，你可以检查一下你是否导入了PCB封装库，如果导入了封装库，那么就是在封装库中找不到原理图中出现过的器件封装，那么你就要检查一下是哪个器件没有封装，自己画一个PCB封装就行了，注意原理图中footprint名一定要和PCB库中的器件名相对应。

Answer 2

因为你的原理图库与PCB库采用的封装的焊盘编号不对应。比如二极管是A/K,你的PCB却弄成1/2了

参考资料：12

Answer 3

因为你的原理图引脚和pcb封装引脚号不对应，所以会发生错误

Answer 4

The reason is you can not find your PCB footprint libraries appear in the schematic device package, you can check you into the PCB footprint libraries, if you import a package repository, then the library is not found in the package appear in the schematic over the device package, then you have to check which devices are not encapsulated, they draw a PCB footprint on the line, pay attention to the schematic and PCB footprint library name must be corresponding to the name of the device.