Internal Error: Sub-system: S2T, File: /quartus/tsm/s2t/s2t_arm_visitors.cpp, Line: 328

Description

Due to a problem in the Quartus® II software version 10.1 and later, you may see this error during Analysis & Synthesis if your design contains a PLL with an unconnected input clock

Resolution

To avoid this problem, ensure that all PLLs have signals connected to their input clocks.