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Filed under: PCB Layout and routing, PCB design, SPB, Allegro PCB Editor, Constraint Manager, via, PCB Editor, PCB, SPB 16.3, Allegro 16.3, \”PCB design\”, SPB16.3 Current design technologies require extremely tight matching requirements right down to the overall net topologies to ensure that any deviations in propagation delays are minimized. As a result, design guidelines call for matching the number of vias for a group of signals. The prior releases of Constraint Manager support a \”MAX_VIA_COUNT\” constraint which does not meet the needs of these new design requirements. The SPB16.3 Allegro PCB Editor constraint system now supports a method to check for an equal number of vias in addition to a \”maximum\” number of vias on a group of nets...

Mentor Graphics PADS 9.0.2 With Update1 release is a full flow release that delivers major functional enhancements to DxDesigner® and HyperLynx® Analog..Please see more details below. DR 594360 – PADSPCB_Install-PADS Suites – Installing PADS 9.0 over PADS 9.0.1 clears the library list for Logic and Layout Problem:  If PADS 9.0.1 is installed over older PADS versions they can coexist without errors. However, when older PADS versions are installed over PADS 9.0.1, the installation process for the older software will not proceed normally due to incompatibilities between the older software and the version of installer used in PADS 9.0.1 which is newer.  The .ini files for PADS Logic and PADS Layout for the older software will not be created.  PADS libraries...