# KiCAD help - "Input Power Pin not driven by any Output Power pins"

**URL:** <https://lookmumnocomputer.discourse.group/t/kicad-help-input-power-pin-not-driven-by-any-output-power-pins/7933>\
**Category:** DIY STUFF\
**Created:** [July 10, 2025, 8:08am UTC](https://lookmumnocomputer.discourse.group/t/kicad-help-input-power-pin-not-driven-by-any-output-power-pins/7933 "2025-07-10T08:08:50Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![krztoff](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/krztoff/32/29609_2.png) [@krztoff](https://lookmumnocomputer.discourse.group/u/krztoff)\
**Post date:** [July 10, 2025, 8:08am UTC](https://lookmumnocomputer.discourse.group/t/kicad-help-input-power-pin-not-driven-by-any-output-power-pins/7933/1 "2025-07-10T08:08:50Z")

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I’m trying to figure out if I have a real issue here, or if KiCAD is just having a brain fart. I have two TL072s running in parallel and one of them is throwing this error when I run ERC, but the other is not. They’re literal copies of one another driving two identical copies of a circuit. Is this post destined for the dumbassery thread and I just haven’t realized it yet?

 ![image](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/c/0/c0a357456da313d411ad65eb5458a40b812913d3.png)

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**Author:** ![hitachii](https://avatars.discourse-cdn.com/v4/letter/h/b5ac83/32.png) [@hitachii](https://lookmumnocomputer.discourse.group/u/hitachii)\
**Post date:** [July 10, 2025, 2:19pm UTC](https://lookmumnocomputer.discourse.group/t/kicad-help-input-power-pin-not-driven-by-any-output-power-pins/7933/2 "2025-07-10T14:19:38Z")

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I usually just shut that error up by throwing a power flag on the power header pins. It seems arbitrary cuz sometimes I don’t get that error at all.

If the op amp power pins connect in PCBNew it should be fine regardless of whether you use a power flag or not.

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**Author:** ![krztoff](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/krztoff/32/29609_2.png) [@krztoff](https://lookmumnocomputer.discourse.group/u/krztoff)\
**Post date:** [July 10, 2025, 2:20pm UTC](https://lookmumnocomputer.discourse.group/t/kicad-help-input-power-pin-not-driven-by-any-output-power-pins/7933/3 "2025-07-10T14:20:43Z")

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I tried that actually. It then gave an error that there were two power sources on each rail 😂

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**Author:** ![hitachii](https://avatars.discourse-cdn.com/v4/letter/h/b5ac83/32.png) [@hitachii](https://lookmumnocomputer.discourse.group/u/hitachii)\
**Post date:** [July 10, 2025, 2:24pm UTC](https://lookmumnocomputer.discourse.group/t/kicad-help-input-power-pin-not-driven-by-any-output-power-pins/7933/4 "2025-07-10T14:24:07Z")

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What happens if you use the “conn02x05” (or whatever it’s called) symbol instead of what you have there?

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**Author:** ![krztoff](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/krztoff/32/29609_2.png) [@krztoff](https://lookmumnocomputer.discourse.group/u/krztoff)\
**Post date:** [July 10, 2025, 4:57pm UTC](https://lookmumnocomputer.discourse.group/t/kicad-help-input-power-pin-not-driven-by-any-output-power-pins/7933/5 "2025-07-10T16:57:23Z")

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Good suggestion. Unfortunately I get the same error using that symbol. (The one I had in there before is from @analogoutput 's library.)

I think I have it sorted now though. For some reason it still threw errors if i put PWR\_FLAG on the net next to the power connector, but if I put the PWR\_FLAG all the way to the left by the +12v/-12v inputs, it worked.

Either that, or the ritual sacrifices finally paid off.