I posted the section of the schematic with the errors. Ignore the logic since it's randomly connected after the cutout. The compiler says:
Warning: No superset bus at connection <---the dest bus
Warning: Pin "DIN6" not connected
Warning: Pin "DIN5" not connected
Warning: Pin "DIN4" not connected
Warning: Pin "DIN3" not connected
Warning: Pin "DIN2" not connected
Warning: Pin "DIN1" not connected
Warning: Pin "DIN0" not connected
Warning: Pin "DIN7" not connected
Error: Node "dest7" is missing source
Error: Node "dest6" is missing source
Error: Node "dest5" is missing source
Error: Node "dest4" is missing source
Error: Node "dest0" is missing source
Error: Node "dest1" is missing source
Error: Node "dest2" is missing source
Error: Node "dest3" is missing source
Error: Node "din[7]" is missing source
Error: Node "din[6]" is missing source
Error: Node "din[5]" is missing source
Error: Node "din[4]" is missing source
Error: Node "din[3]" is missing source
Error: Node "din[2]" is missing source
Error: Node "din[1]" is missing source
Error: Node "din[0]" is missing source
I've check the drafting and all lines seem properly connected. I tried redrawing, renaming and reconfiguring and it didn't get rid of the errors. Replacing the individual pins for din[7..0] with a singe bus pin did fix the "node din(x) missing source" error.