Cannot find PLL settings that allow for truncation-free problems in TimeQuest - Cannot find PLL settings that allow for truncation-free problems in TimeQuest Description You may see this error in the MegaWizard message window in Quartus ® II 12.0SP2 when generating Altera® UniPHY external memory interface IP with clock definitions which result in non integer values of clock period in ps. The memory IP performs the following check: set period_ps [expr10^6/] if ([expr int(*2)] == [expr int()*2]) If this is not true then the error will be reported in the MegaWizard message window. For example where a 375MHz clock is used, int(*2) is 5333ps but int()*2 is 5334ps. Resolution Select a PLL reference clock frequency that results in a clock with a period which is an integer number of ps. This issue has been fixed in Quartus II 12.1 Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 12.0.2 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']