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As first-time KiCAD user, I was able to draw a simple schema with a CD4011 driving 2 relais. The "electrical rules checker" -finally- gives no errors or warnings. After creating the netlist and placing the components on the PCB, there is no way to route a track from the Vdd power-in pin to pin 14 or from the Vss power-in pin to pin 7 of the CD4011. Worse, I can place a track between Pins 7 and 14 . . .

In the standard symbol_dir, pins 7 and 14 are declared as VSS and VDD "power input" :

CD4011_symbol_dir

This is (part) of the schema with "show invisible pins" activated :

Eeschema_CD4011

No hidden pins at the CD4011 ...

After reading lots of info on various websites, I tried this power-schema :

Eeschema_Power_part

In Pcbnew highlighting the "GND" net does not include any pin of the CD4011 ...

Pcbnew_highlight_GND_net

Even more curious, Pcbnew lets me connect pins 7 and 14 of the CD4011 :

Pcbnew_CD4011_tack_pins_7_14

Where oh where did I go wrong ? ? ?

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    \$\begingroup\$ Did you connect the pins in eeschema? As they are not invisible you need to do this. For that you might need to add the 5th unit (unit E) \$\endgroup\$ – Rene Pöschl Nov 21 '18 at 21:06
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You are missing "Unit E" of the quad pack. How this symbol works is there is a part of each of the quad (Unit A -> Unit D) and then an additional one for the power.

Your first image shows it but then the next images does not.

enter image description here enter image description here

So your circuit should have 5 components. So a quick throwaway design:

enter image description here

Finally the layout with a quick ground trace to see all GND pins highlighted

enter image description here

In short, ensure all parts of a multi-symbol part are placed and wired

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