Issue with Altium - Unrounted Net - Page 1
Forum section: electronics / general

author: Shay
author_rank: Regular Contributor
timestamp: October 29, 2023, 06:49:05 pm
content: Hello,I have a weird issue in Altium. It keeps showing me that I have unrounted net, even though it is routed. See the picture for an example:It is showing un-routed net between the GND th pad and a blind via in pad. The dark yellow is GND layer (it is a 4 layer board).What could be the issue?Thanks.

author: jc101
author_rank: Frequent Contributor
timestamp: October 29, 2023, 07:21:10 pm
content: That looks like there are two via's on top of one another, which could cause this.

author: Shay
author_rank: Regular Contributor
timestamp: October 29, 2023, 08:18:37 pm
content: Quote from: jc101 on October 29, 2023, 07:21:10 pmAlthough looks like it, there is actually only 1 via.

author: tszaboo
author_rank: Super Contributor
timestamp: October 29, 2023, 10:52:52 pm
content: There are some settings that require every net, including GND to be routed, even if it's on a polygon pour or plane. Its because poly pour can become very narrow. Turn it off or just route it with a track in the poly.

author: Bud
author_rank: Super Contributor
timestamp: October 29, 2023, 11:17:19 pm
content: Drag the 'unrouted' via and drop on the big one. It will connect. Then drag it back to where you want it to be.

author: RiZsho
author_rank: Contributor
timestamp: October 30, 2023, 10:32:31 am
content: Is the GND THT pin plated? That could be the issue...

author: Psi
author_rank: Super Contributor
timestamp: October 30, 2023, 11:06:50 am
content: Quote from: Shay on October 29, 2023, 08:18:37 pmAre you sure there is only 1 via, that ghost text is a pretty sure sign there are 2 vias on top of each other.How did you confirm there's only 1?Select the via and change it's hole and pad size to be very small, like 0.1mm and see if that visually changes what it looks like or not.If its two via's on top of each other then whichever one you select and change it's size wont make a visual difference because the other is still there.

author: Shay
author_rank: Regular Contributor
timestamp: October 30, 2023, 05:07:51 pm
content: Quote from: tszaboo on October 29, 2023, 10:52:52 pmDo you know which setting it is? routing a track did the job.Quote from: Bud on October 29, 2023, 11:17:19 pmThank you. Seems like the issue is related to some-kind of a rule.Quote from: RiZsho on October 30, 2023, 10:32:31 amYes, it is plated.Quote from: Psi on October 30, 2023, 11:06:50 amI removed the via and replaced it, same issue. Double clicking doesn't show any other via, and I tried changing the size and I still can't see any additional via.

author: Shay
author_rank: Regular Contributor
timestamp: October 30, 2023, 10:11:19 pm
content: Ok, weird issue:When I route GND pad to GND pad on GND layer, and I repour the GND polygon, it keeps clearence between the track that I routed. Kinda like it does not know that the polygon is actually a GND layer.

author: thm_w
author_rank: Super Contributor
timestamp: October 30, 2023, 11:11:14 pm
content: https://electronics.stackexchange.com/questions/562627/why-wont-this-trace-connect-to-the-copper-pour

author: Psi
author_rank: Super Contributor
timestamp: October 30, 2023, 11:16:23 pm
content: I never actually have ground/power planes.I always have all copper signal layers and simply do a polygon fill over them to make them ground/power only.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: October 31, 2023, 01:42:13 am
content: Cropped:Your hint is it's making some clearance, though that wasn't obvious from the first image.I don't know what use the setting is, honestly, but it's there if you ever need it...Tim

author: ajb
author_rank: Super Contributor
timestamp: October 31, 2023, 05:05:58 am
content: Quote from: T3sl4co1l on October 31, 2023, 01:42:13 amit can be useful to cheat a sense trace into a polygon, like to land it right on a big polygon-connected pad, without having to keep messing with the polygon. There are arguably better ways of doing that, like splitting the pad in the footprint, with or without net tie, so the trace line can be a separate net. But's a quick solution, if inconveniently indiscriminate. Can also be helpful as a reminder that you need to be particular about where a track connects to some polygon routing (for whatever reason) while shoving things around.