I've seen this happen with both Multilayer and top only SMD...just happened
to me yesterday...
Best way to find it is to look at the report (menu - Reports - Board
Information - then generate the report by setting to all). You'll see a
heading for non-plated hole sizes like so:
Non-Plated Hole Size Pads Vias
----------------------------------------
0mil (0mm) 4 0
26mil (0.6604mm) 2 0
28mil (0.7112mm) 1 0
42mil (1.0668mm) 1 0
80mil (2.032mm) 2 0
94mil (2.3876mm) 5 0
96mil (2.4384mm) 6 0
104mil (2.6416mm) 2 0
110mil (2.794mm) 8 0
124mil (3.1496mm) 3 0
125mil (3.175mm) 1 0
128mil (3.2512mm) 2 0
157mil (3.9878mm) 2 0
----------------------------------------
Total 39 0
Yours will have different data of course.
It happened to me with a PADS generated footprint (yea the 901 pin BGA I've
posted about before) that I grabbed from a PADS ASCII import.
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