Checking non-numbered parts...

Checking duplicated references...

Checking NoConnection nets for connections...

Checking nets with only one connection...
ERROR: Net 'GND' is connected to only one pin: U100:7 .
ERROR: Net 'Vcc' is connected to only one pin: U100:14 .

Checking pins without the 'pintype' attribute...

Checking type of pins connected to a net...
ERROR: Pin(s) with pintype 'output': U100:8 U100:6 
	are connected by net 'SING_N'
	to pin(s) with pintype 'output': U100:8 U100:6 

Checking unconnected pins...
ERROR: Unconnected pin U100:2

Checking slots...

Checking duplicated slots...

Checking unused slots...
WARNING: Unused slot 4 of uref U100

Found 1 warnings.
Found 4 errors.