It's connected but: pin-connected-to-other-pins-but-not-driven-by-any-other-pin

[tormyvancool]

Sorry I just mistyped. I corrected it.

[retiredfeline]

Some reading from the FAQs for you in case you bump into more ERC issues.

ErrType(3): Pin connected to some others pins but no pin to drive it

Additional reading about pin types in general: Electrical type of schematic symbol pins (KiCad 4 and KiCad 5) A good explanation about power symbols can be found in this stackexchange answer by @Seth_h KiCad does check if every component is connected to supply lines (*1) as a missing supply is a common mistake to make. Getting the error “ErrType(3): Pin connected to some others pins but no pin to drive it” means that KiCad thinks that some supply pin is not properly connected. Either because …

Unlike Piotr, some of us think ERC is useful, you just have to understand what it’s saying and when to use your own judgement.

[Piotr]

@jmk

I do remember that I have some real 74xx (without all those letters) ICs somewhere out in the shed,

I earned my first real money in my live by designing and making a device that contained a lot of 74xx ICs. I was a student and got for it 2.5x my father month salary. The factory device doing the same cost 4x more. What I have done was chronocomparator - you put on its table the electronic watch and you see at its display how accurate is that watch (0.1s/day resolution). I made a quartz 1MHz generator. I used thermistor to stabilize temperature (BD139 was the heater). The generator was encased in polystyrene. Chronocomparator stabilized after about 15 minutes after being switched on. I found that after 8 hours it lost accuracy. The reason was the 74xx ICs give off a lot of heat and temperature inside whole case got higher than I set in generator. I made a lot of 5mm holes in wooden case of that and raised the generator temperature.

[Piotr]

@retiredfeline

Unlike Piotr, some of us think ERC is useful

I don’t say it is not useful.
Years ago, I took over our PCB making from someone else. This person, telling what to do in turn, did not mention the existence of the ERC in Protel, and I only used what I needed and never found this function. When I decided to move to KiCad was the first time I noticed ERC, but found that to have 0 errors I have to add many symbols to my schematic I don’t like. So as I have been without an ERC for teen years I assumed it may continue to do so. Why many - because I use many ferrite beads in power lines and because I prefer continuous GND at bottom so it happens me to use 0Rs in power lines. Adding Power Flag after each of it has no sense to me.

[retiredfeline]

Understood. But if I had a dollar for every time you write about avoiding ERC I could go buy a nice computer.

[Piotr]

@retiredfeline

if I had a dollar for every time you write about avoiding ERC

If you ask for a dollar for every question about power inputs not driven by power output you could earn more, I believe. But I have to admit that not a lot more
I will try to hold back myself from writing this.
I don’t know if in V6 it will be possible to block that one Error. If so may be I will start to use ERC.

[jmk]

What is ERC?

Not quite true… I do use it often enough to not really forget.