Upon completion, the installer will ask to restart the "Cadence Project Manager." Click Yes . This re-registers OCX controls.

While Cadence has since moved on to newer versions (17.2, 17.4, and the 22.1 releases), the 16.6 family remains the "Windows XP" of the EDA world—rock-solid, extensively documented, and trusted by thousands of small-to-medium enterprises (SMEs) and freelancers. The specific hotfix represents a crucial stability patch that solved numerous irritating bugs and performance bottlenecks.

Right-click the .exe → Run as Administrator .

Have you experienced a specific bug fixed by 16.60.004? Share your story in the comments below (if republishing on a forum).