程序报错

ERROR:Place:293 - The following 1 components are required to be placed in a specific relative placement form. The required relative coordinates in the RPM grid (that can be seen in the FPGA Editor) are shown in brackets next to the component names. Due to placement constraints it is impossible to place the components in the required form.
ERROR:Pack:1654 - The timing-driven placement phase encountered an error.

我在程序中倍频到300mHZ
程序报错如上提示。怎么回事呢？？

确定，我使用示波器测量过

确定，我使用示波器测量过

恩恩，的确是时序报错已经找到原因。