Xilinx Vivado 20202 Fixed -

After install, Vivado claims no licenses exist, even with a valid .lic file. Fix in 2020.2:

Synthesis results do not match simulation behavior, particularly with certain HDL constructs. xilinx vivado 20202 fixed

While full support came later, 2020.2 provided preliminary fixes for AI Engine simulation mismatches—specifically, fixing a data type conversion error between the AI Engine API and the RTL simulation model. After install, Vivado claims no licenses exist, even

# Set this environment variable explicitly export XILINXD_LICENSE_FILE=/path/to/your/license.lic # Or, for Windows setx XILINXD_LICENSE_FILE "C:\path\to\license.lic" The fix requires manually inserting #pragma HLS stable

A common issue involves the Generate Block Design process getting stuck at 99% during HLS analysis. Workarounds typically involve clearing the IP cache or resetting output products.

still contains a critical bug where #pragma HLS dataflow with multiple producer-consumer tasks can deadlock if one task uses a stream with depth > 1. The fix requires manually inserting #pragma HLS stable . This was not addressed until 2021.1.

Some issues don't have official patches but have community-tested fixes.