DxDesigner Design Rule Check Errors

Question

I'm using Mentor Graphics's DxDesigner to design a PCB. As a side note, I do know what design rule checks (DRCs) are, but I'm completely new to DxDesigner and am not sure what each of their DRCs are.

I currently have 335 errors.

• 328 connectivity errors

  • drc-106 --> more than one driver on a net
  • drc-121 --> redundant hierarchical symbol on net

• 7 migration errors

  • drc-001 --> Property ______ has invalid format
  • Note: the specified properties contain these characters: letters, numbers, dashes

If anyone knows how to fix these DRCs that would be great. Otherwise, a link to some good documentation would also be great.

Answer 1

As a first port of call I would try loading the help documentation in DxDesigner.? There is actually a surprising amount of information which has helpful search functionality.

In any case, hopefully the following will help:

• DRC-106 is basically you have more than one pin of type "output" connected to a net (e.g. two logic gate outputs) which is usually indicative of either a bad connection, or incorrect pin type in one or other of the symbols.
• DRC-121 indicates that you have a hierarchy symbol (e.g. "hier-in" or "hier-out", etc.) symbol attached to a net in your schematic, but you are not using it for anything. As such that symbol is redundant.

Not sure about DRC-001.