Critical Warning(19536): Report Metastability (Fast vid3 100C Model): Found 609 synchronizer chains, 1 with unsafe MTBF. - Critical Warning(19536): Report Metastability (Fast vid3 100C Model): Found 609 synchronizer chains, 1 with unsafe MTBF. Description You may see the above Critical Warning message or similar in the Intel® Quartus® Prime Pro Edition Software version 22.3 when compiling a design that instances the F-tile CPRI PHY Intel® FPGA IP, the F-tile Interlaken Intel® FPGA IP, and the F-tile Serial Lite IV Intel® FPGA IP and targeting an Intel Agilex® device with Package Code R47A . This is because, for the Intel Agilex devices with Package Code R47A , these IPs currently do not support Tile Speed Grade -3 due to Mean Time Between Failure (MTBF) limitation. Intel recommends using a faster Tile Speed Grade device unless the reported MTBF is within the acceptable range for the user's application. Resolution There are two workarounds to avoid this warning: Users can select a faster speed-grade device . An example device with Tile Speed Grade 2 is: AGMF039R47A2E2VR0 Add the QSF assignment: set_global_assignment -name MIN_MTBF_REQUIREMENT 9 ( Notes: User can overwrite the 9 to a lower value acceptable for user's application) This problem has been fixed in the Intel® Quartus® Prime Pro Edition Software version 22.4. Custom Fields values: ['novalue'] Errata 15011918774 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 22.4 22.3 ['Agilex™ 7 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']