Hello I'm new here and Its my first time to use Express SCH & PCB for my senior project.

What I have been trying to do is to design a PCB for my ultrasonic time transit transducers.the TDC is a QFN 32 with a .05mm pitch.

I finished the schematics but I kept having a netlist error when I was checking it.

"The selected pin is not part of any component. All pins in a schematic must be grouped together with their component.

Use the "group to make component: command to build pins into a component"

I'm not quite sure what I did wrong with the pin/ custom component (GP22)

I have attached my schematics in here also. Please help!

Thank you

Darrel

Student from University of Washington

 

The labels and numbers on the right side of GP22 are on the outside of the symbol outline, instead of being inside like the other three sides. Is that a problem?

 

I don't think so. I just moved the indvidual text out of the way so it does not cramped up. but it was just a certain pin that is giving me that error (pin 25)

 

Then it must think there's something wrong with pin 25's placement. Try redoing that pin in the custom component symbol.