Symptom: Synthesis stops with ERROR: Failed to generate 'core' file due to insufficient disk space. But you have terabytes free. Root Cause: Vivado 2020.2 has a 2GB file size limit bug on NFS (Network File System) drives. Fix:

The Problem (2020.1): The PR verification flow (pr_verify) would falsely flag legal reconfiguration modules as invalid due to a "boundary cell mismatch" error, even when the reconfigurable partition pins matched.

The Fix in 2020.2: The boundary logic extraction algorithm was recalibrated. pr_verify now correctly ignores dummy cells placed during the initial configuration stage. This was a silent killer for many defense and aerospace projects that rely on PR.

Verdict: FIXED. The PR flow in 2020.2 is considered the most stable since Vivado 2019.2.

Symptom: Power estimator shows 0W for Versal CVM1848. Fix: Download the standalone Power Estimator (PEEP) for 2020.2 from Xilinx.com. Do not rely on the in-tool estimator for Versal on 2020.2.