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Null REGULAR-PAD specified when creating artwork

avant

On some designs, I get the warning "Null REGULAR-PAD specified for padstack SQ_P3XP3MM" and other padstacks.

What is odd is that the same footprint / pads used on another design does not give me the warnings.

I used the same artwork parameter files, and I replaced the footprint and padstacks. 

I don't see any undefined or null shapes in the padstack.

Is there anything else I can look at to correct this?

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