Xilinx Vivado 20202 — Fixed

If your testbench used packed structs , unions , or complex interface modports, XSIM would frequently crash with Internal Error: xvcs.exe : *** Fatal Error: Segmentation Fault .

—the phase where the tool optimizes the physical placement of logic. There were no error codes, just immediate desktop crashes. The Twist: xilinx vivado 20202 fixed

For FPGA designers and embedded systems engineers, the release of a new version of Xilinx (now AMD) Vivado is rarely met with excitement. It is met, instead, with cautious hope. The jump from Vivado 2020.1 to was particularly scrutinized. While 2020.1 introduced critical support for new devices like the Versal ACAP and Kintex UltraScale+, it also shipped with a laundry list of bugs ranging from GUI freezes to synthesis logic mismatches. If your testbench used packed structs , unions

Some users experience crashes during phys_opt_design . A temporary fix is to write a checkpoint after placement, then manually restart the flow from that point. The Twist: For FPGA designers and embedded systems