Steve, I appreciate the help. I started working with EMA-EDA support yesterday afternoon on the issue. For posterity, I've tried the following. Please try starting the PCB Editor from the Windows Start menu using the following command. C:\Cadence\SPB_17.4\tools\bin\allegro -safe If that makes no difference, try starting the editor with this command C:\Cadence\SPB_17.4\tools\bin\allegro -noopengl Neither of those commands worked. This issue started after a Windows system update, so something must have been changed or corrupted in that process. I am now re-installing the application.
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