A fab house is raising a strange error on through hole pad connections. In the top layer all connections are made but they are saying the bottom layer is left unconnected.
Its a breakout board for a 32 pin QFN IC. I used a 8-pin through hole connector and connected it to each side of the Chip and connected all the IC pins with each 8-pin connectors on the top layer.
But now the fab house is saying, the bottom layer has pads and there is no connections. Why is it required?
Gerber Files and its images - https://drive.google.com/file/d/0B3tW8HqE_ubMNTZiTlNBamhBRTJTeTlQcE41MVFyNWllT2Uw/view?usp=sharing